etc减产

#新币挖矿 #etc减产
Looking at the shape of the Ether cake, I was panicking hahahaha

Fortunately, I still shorted it! Let everyone cover their positions near 2980! Currently profitable! Keep holding!

Wait for it to release! Free attention and likes!

The codes I recommended to you recently are basically profitable, and I will always make money as a blogger hahahaha. $ETH $BTC

↗️This May is destined to be unusual↖️

This continuous plunge has made everyone panic. Is the bull market over? I think not. There is no sign of outflow of the total amount of stablecoins on the market, and the Federal Reserve has no tendency to increase interest rate hikes and shrink its balance sheet. At present, we can only trade time for space, so what is worth looking forward to in May?

1. In May, whether the ETF is passed is the focus of market attention. Remember to pay attention to the news on May 23. At the same time, Ethereum Prague upgrade is also worth looking forward to. Pay attention to the associated currencies SSV, OP and ETHFI, don't miss the opportunity.

2. AI intelligence is even more of a hot topic. The Apple Developer Conference will be held on June 10, and GPT-5 is expected to be released in June. Pay attention to the associated currencies WLD, NEAR, RDNR, ARKM, AGIX, FET, PHB, and keep up with the trend of technology! In addition, the ETC halving time is coming on June 16, so make arrangements in advance to seize the halving market.

3. Finally, don’t forget the sports events. The European Cup in June and the Olympics in July and August are good for Binance’s own SANTOS. Other fan coins such as CHZ are also worth paying attention to. Let’s cheer for sports together.

There are many investment opportunities after May. From technology to sports, there is always one suitable for you.

If you are still confused in the currency circle, follow the big bulls and share the latest information every day.
#BTC #ETH #Meme币你看好哪一个？ #etc减产

The beginning of June is the halving time of ETC. There will be capital speculation half a month before the halving. We can judge whether there is an opportunity to operate through the pattern and the structure of the entanglement theory~

From the pattern of the monthly line, it is back to the support of the Bollinger middle rail, and the yellow and white lines of the macd are pulling up the zero axis, which is a very good opportunity for bulls~

From the pattern of the weekly line, the support of the 120+250 moving average, multiple moving averages are glued together and ready to diverge upward. Here, it is in a narrow range of oscillation repair. The yellow and white lines of the macd are expected to rebound after back to the zero axis~

From the perspective of the daily line entanglement theory structure, the structure appears inside the lower section of the daily line, and the previous pin point just hits the support above the center. From the perspective of carving a boat to seek a sword, this pattern was also before the last halving, and then it led to a wave of violent rise. If you buy at the current price, you need to do risk control at 23. The best buying position after breaking is 19 yuan~

Directly locate to the four-hour, the potential third section of the center, it is worth trying. You can start from the 30-minute rise and follow it~
#山寨币热点 #etc减产 #ETC/USDT

Bitcoin fell to $60,000. Will the 519 crash in the cryptocurrency market really happen again?

On May 9th, we finally welcomed a wave of increases, but today we were ruthlessly suppressed by airdrops

The price is still the previous price, and tens of thousands of people have been liquidated. This bloody wash has already touched the bottom line of countless people

This wave of decline has also made the bulls more and more fearful, and they feel deeply that they can't see hope

In addition, there is the haze of the 519 coin circle crash in 2021, and this inner panic is out of control

The coins in my hand have become "hot potatoes". It's not right to throw them away, and it's not right to hold them. I can only look around for news

In the current market, the voice of a big drop can be said to occupy half of the country

In fact, no matter how the market goes, what voices exist in the market, it has never stopped for the coin circle

As long as you start to listen to the news, believe the news, and believe in the feeling, this is the wrong start, especially if you rely on your feeling to guess the market and make money

Then your nightmare begins. This kind of big money from luck will be your transfer into the abyss

Stay away from negative news and negative energy groups, otherwise excellent people will be assimilated by a group of toxic people

Let's talk about the market, the market Although it fell sharply, the real body of the negative line is also very huge. The decline is also quite "astonishing", and the volume is also huge. This is a healthy downward trend. However, the larger the first negative line is, and it falls to this support level, it needs special attention. Because it will touch the support level below, that is, the locked-in disk in the range of 61,000 US dollars to 56,000 US dollars. If they can withstand the sharp drop of the shorts, then they will be verified on the K line. The stop-loss signal is what needs to be paid close attention to next, because this position is very critical. For naked K, the larger the shape, the greater the probability of stopping the decline and reversing, such as: cross morning star, tower bottom, bullish engulfing. Of course, friends who have learned other technical analysis can combine what they have learned, because there are many analysis systems, I am just better at using naked K. The current trend: each wave of rise looks laborious, but the decline is very smooth, but if you zoom in a little to the daily and weekly lines, they are still just oscillations. The real outcome may be next week, probably before May 13, let us witness it together.
The subsequent market trend is actually not complicated. If you have any confusion or want to consult, you can find me by clicking on the avatar to see the introduction.

#ETH #BTC走势分析 #Megadrop #5月市场关键事件 #etc减产

Memecoin season is coming: these five hot picks are worth watching

With the volatility of the cryptocurrency market, traders are looking to the return of meme season. Memecoins tend to rise against the trend when the overall market is unstable.

Today, we will reveal the five hot memecoins worth watching in the market: KangaMoon (KANG), Dogecoin (DOGE), Shiba Inu (SHIB), Pepe (PEPE) and Dogwifhat (WIF).

1.KANG: The rise of the new star memecoin
As a new popular memecoin, it has earned more than $6.4 million in the pre-sale stage and is expected to exceed $7 million by May 2024. Its 290% ROI, SocialFi elements and practical applications in P2E games indicate that KANG will make waves in meme season.

2.DOGE: The revival of the classic memecoin
DOGE needs no introduction. As one of the original memecoins, it stands out in the market with its unique Shiba Inu mascot and huge community support. As meme season approaches, DOGE is expected to once again take center stage.

3. SHIB: A giant in the memecoin space
SHIB has become a leader in the memecoin space with its unique brand and loyal community. As meme season approaches, SHIB is expected to reach new heights with its strong community support.

4. PEPE: A resilient meme star
As the cryptocurrency representing the famous Pepe the Frog meme, PEPE has shown good resilience during market declines. As meme season continues, Pepe is expected to inject new vitality into the crypto market.

5. WIF: A meme star to watch
WIF has emerged in the memecoin market with its unique brand and growth potential. As meme season approaches, WIF is expected to gain more attention with its meme-worthy brand and strong technical analysis.

What are memecoins?
Memecoins, or meme coins, are cryptocurrencies that gain value through community engagement and viral marketing. They are often characterized by playful, interesting themes or iconic characters and are closely tied to Internet culture.

Should I buy meme coins?

The decision to purchase Memecoin should be based on your investment objectives and risk appetite. Keep in mind that Memecoin is a high-risk, high-reward investment. Consider community participation, hype, utility, and personal risk tolerance when making your decision.

Conclusion: Despite the uncertainty in the cryptocurrency market, Meme coins still attract the attention of traders. 💰qun 蟋玮: 417072555 In the upcoming meme season, KangaMoon, Dogecoin, Shiba Inu, Pepe and Dogwifhat are expected to become the highlights of the market. However, when making investment decisions, do not go all in. The position must be reasonably allocated according to your own account. This is the correct way to invest

#BTC #ETH #Binance #etc减产 #山寨币热点

At 11:15 noon on May 13, 2024, the current real-time market of Bitcoin opened a short position, with a target of 60263-57552
Opened a short position near the price shown in the figure #新币挖矿 #ETH #etc减产 #BTC走势分析 $BTC $ETH

Before the arrival of the cottage season, keep an eye on the key price points of several good targets

1. WLD: 4.2 to 3.5
2. Shib: 0.16 to 0.18
3. WIF: 1.8 to 2.2
4. PEPE: 0.000004 to 0.000005
5. RNDR: 6 to 6.5

In the middle and late stages of the bull market, the big cake is no longer a wealth-making machine. New funds will flow to various cottages. It is time for the cottages to shine!

$BTC
$ETH $SOL
#山寨币热点 #BTC走势分析 #Meme币你看好哪一个？ #etc减产 #香港加密货币ETF

#美国4月CPI通胀数据即将公布 #etc减产 $PEPE $BNB
A major whale movement just shook up the market! 😱 0x4cff has moved a staggering $121 billion PEPE (equivalent to $1 million) to a Binance deposit address. This massive transfer leaves only a small portion of $1.1 billion PEPE ($10,000) in its original address.

Such a massive transfer to Binance could signal an impending sell-off that could cause the price of PEPE coins to drop significantly. Investors, be prepared for potential volatility in the coming hours! 📉

The expected inflation rate of the United States in May is 3.2%, and the announced value is 3.5%.
High inflation -> delayed interest rate cut expectations -> Bitcoin falls
Low inflation -> advanced interest rate cut expectations -> Bitcoin rises

In addition to macro data, we must also keep an eye on the Nasdaq. For example, the trend of Bitcoin yesterday and today basically coincides with the Nasdaq minute level, especially when there is no independent narrative, the volume shrinkage is more obvious.

Macro data -> Nasdaq -> Bitcoin with technology stock attributes -> general direction of the currency market

$BTC
$ETH
$SOL
#山寨币热点 #BTC走势分析 #Meme币你看好哪一个？ #etc减产 #香港加密货币ETF

Yesterday's Ethereum short-order strategy was successful, with a profit of 50 points, and the initial stop profit was in place. Unfortunately, the market did not continue to explore and then rebound, but overall the performance was good. Today is Friday again, known as Black Friday, which is often the time when the market changes. Now we need to pay attention to the 3060 and 3130 positions above, both of which have a strong suppressive effect. At present, we need to pay more attention to whether the suppression is successful to decide whether to continue the short-order operation.
At present, the overall market lacks major news and market influence, and we need to pay more attention to the market trend. After three consecutive negatives, the naked K-day line closed positive yesterday. Whether it will bottom out again and close negative today, hitting the double bottom 2850 position, this needs to be closely watched.
At present, it is in a more confused stage and is not sure how to operate. Whether it is a contract or spot, or other issues, you can pay attention to \/: TCR6072 to communicate and keep up with the layout.
Judging from the weak volume of the recent bull rebound, it may be a re-explosion after bottoming out. Therefore, it is more necessary to pay attention to the impact of the later news. This month's weekly K-level has been fluctuating between 3320 and 2850. For trend followers, such a market trend is indeed more comfortable.
Therefore, this week we need to pay more attention to today's trend. If the next round still cannot break out and enter a new range, then next week we may continue to layout within the range and wait for the break before deciding the trend of the next round of levels.
#新币挖矿 #山寨币热点 #BTC走势分析 #Meme币你看好哪一个？ #etc减产

#etc减产 $PEPE $BNB $FDUSD
Can Pepecoin hit the $0.1 mark?

Current market forecasts indicate that it seems to be a difficult task for PEPE to reach $0.1. Here are a few key prediction points:

CoinCodex’s short-term forecast: By June 10, 2024, Pepe is expected to experience a significant rise, but only by 229.91%, bringing its price to approximately $0.00002889. This forecast is well below the $0.1 target.

Long-term forecast analysis:

2025: In this year, the expected lowest price of Pepe Coin is $0.000058, and the highest price is only $0.00004165, which is obviously far lower than the $0.1 target we discussed. 2030: Despite the longer time span, Pepe’s projected price range is still lower, with a low of $0.00002238 and a high of $0.00003628.

Pepecoin’s rising demand: To reach $0.1, Pepecoin would need to experience a huge rise, specifically as high as 496,121.63%. This number seems particularly staggering in the cryptocurrency market and seems to be an unrealistic goal based on current market trends and forecasts.

The crypto market has experienced a 413 plummet, and copycats have generally corrected by 50%-80%. Many fans’ assets have been halved. I personally feel deeply sad and regretful. Next, I anchored a spot of Jiuyi. Personal news is that market traders have entered the market. Be prepared to take action, hesitation will lead to defeat! Portal: 币大仙

#山寨币热点 #etc减产

Talk about how to deploy altcoins at this stage:

After sorting out the tracks and varieties that should be deployed, there are still very many. There are currently many projects on BN. How to screen, my personal method is to find those with high trading volume and relatively low market value. This type of project can be cleared and deployed ten times or a hundred times!

Secondly, the track. There are still many hundred-fold projects in BN's IEO project in the last bull market, so we can focus on and deploy this area!

Secondly, the star ecosystem SOL since this year, as well as the Ethereum ecosystem, fan series, Hong Kong concept, big cake ecosystem, RWA, modularization, re-staking, L2, oracle, DWF, etc. In fact, the focus of the layout is the following front ones. Many old ecosystems that were hyped in the last bull market may not necessarily have too much performance in this round!

The market always speculates on new things instead of old ones, whether it is old varieties or old tracks! After all, new things can tell a better story, and the selling pressure is relatively less than that of old projects, so we must embrace new things, such as inscriptions, which will definitely have a chance to explode.

The dividends of the market are cyclical. The bull market in 2017 ended at the end of the year, and many cottages in the bull market in 2021 actually ended in the middle of the year. Some sectors were accompanied by the outbreak of the market metaverse, and the big cake once again reached a new high and ended the bull market at the end of the year. The arrival of this round of bull market, I personally expect it to be faster than the previous round, and it will end slower! Just like many people, big cake is not actually on the car at present, because it has risen too fast, beyond the expectations of many people! Then the arrival of the cottage season may be the same, so fast that it will catch people off guard, and it will end quietly! What we need to do is to ambush in advance! Hold the chips and wait for the wind to come!

$TRB $BTC $PEPE

May 11, 2024 14:25. When the market rebounds, you can close ai.wld long orders and buy near the screenshot price. WLD target 5.69157-6.0853
ai target 1.1777-1.2059#新币挖矿 #BTC走势分析 #etc减产 #ETH $ai.wld

Don't be anxious, and don't panic when the price drops. Maybe this is the 80/20 rule. The people who panic are always the 80% of people. They are all expecting. What are you afraid of?
Regarding the current callback, let me confirm a few points for you:
1. This round of callback of the big cake is reversing to pick up people
2. The longer the big cake fluctuates between 58,000 and 65,000, the more favorable it is for the second half of the market to start!
3. The specific end time of the callback, I think at least 3 to 5 weekly K
4. During the fluctuation period, local speculation of copycat hot spots will continue, such as some hot spots of sectors arranged in our internal group!
If you feel helpless and confused in trading at the moment, want to know more about the relevant knowledge of the currency circle and first-hand cutting-edge information, click on the avatar introduction to find me
#BTC走势分析 #5月市场关键事件 #etc减产

These operations will only make you lose more money. It is recommended that investors spend a minute to watch and play!

Operation 1: Blindly chasing ups and downs

Key point: Don't follow the trend! The digital currency market fluctuates greatly. It is easy to stand guard when chasing ups, and selling downs may be sold at the lowest point. Do your homework and make calm judgments.

Operation 2: Only focus on short-term returns

Key point: Play the long game and catch big fish! Short-term fluctuations are large, and frequent transactions are costly. Long-term holding and value investment are more reliable.

Operation 3: Regardless of risk management

Key point: Diversify investments and don't put all your eggs in one basket. Set a stop loss point, stop loss in time, and protect the principal.

Operation 4: Listen to rumors

Key point: Don't be fooled by rumors! Only believe in reliable information, analyze rationally, and don't blindly follow the trend.

If you want to know more about the relevant knowledge of the currency circle, first-hand cutting-edge information and real-time strategy layout, you can pay attention to the "Official Account: Chief of Staff of the Currency Circle" to publish market analysis every day and make a stable profit layout! #山寨币热点 #etc减产 #ETH #BTC

$PEPE $FRONT $SAGA #etc减产

Before the real take-off, the historical cycle of Bitcoin has never changed

The bull market in the currency circle will probably be divided into three stages

1. BTC climbs, blood-sucking altcoins, BTC and Bitcoin ecology will continue to be strong.

2. ETH relays the soaring, and hot altcoins rise along with Ethereum, such as AI, Web3, L2, chain games, metaverse, new public chains, BTC ecology and other tracks.

3. All coins rise, and the scene of assets doubling after a night's sleep, MEME performance season, local dogs flying all over the sky, FOMO reaches its peak.

We are currently waiting for the arrival of the second stage, waiting for ETH to take off, leading the rotation of sectors, and I believe this moment will come soon!

Click on the avatar, follow the homepage introduction to find me, face the fans, my bull market strategy layout, free sharing, and be a free blogger, just to increase fans. If you come to me, I can take you ashore. I won’t let my fans miss out in this bull market! Just lie down!

Bulls are not moving? They are all out of steam!

It’s basically not doubled, so many people can’t take the trap, right? Then let’s take a look at the program list for the second half:

1. European Cup and Sports Fan Coin in June:

* In June, the European Cup football match will be held. Virtual currencies related to it, such as chz (the fan coin leader), SANTOS (closely linked to Binance), por (endorsed by Portugal’s Cristiano Ronaldo) and ARG (endorsed by Argentina’s Messi), may attract the attention of fans and investors.

2. Apple Developer Conference and the release of GPT5:

*On June 10, Apple will hold a developer conference, and GPT5 (a possible artificial intelligence technology) is also expected to be released in June. Virtual currencies related to these technologies or companies, such as AGIX, FET, OCEAN, RNDR, ARKM and WLD, may attract market attention.

3. ETC (Ethereum Classic) production reduction:
ETC (Ethereum Classic) will reduce production in June. Although the overall performance of the Ethereum system (ETH and related tokens) is not strong enough in this bull market, the reduction of ETC may bring some investment opportunities to it.

4. Solana Annual Conference in September:
In September, Solana will hold its annual conference. Virtual currencies related to the Solana ecosystem, such as RAY, JUP, PYTH, and other small tokens on the Solana chain (commonly known as "dogs"), may attract market attention. In this bull market, the tokens of the Solana ecosystem have performed strongly, attracting a lot of attention and funds.

In short, this information seems to be predicting and discussing possible market opportunities and events in the next few months. #山寨币热点 #BTC走势分析 #5月市场关键事件 #etc减产

The market trend is full of uncertainty. If you don't understand trading technology and can't identify the disk, no matter how good the opportunity is, it has nothing to do with you. Follow me on the homepage, and the circle will share spot passwords for free every day. Bull market layout strategy

At 16:44 on May 11, 2024, open a short position at the current screenshot of Bitcoin, with the target at 601282 and then 59761, and set a stop loss of #BTC走势分析 #ETFvsBTC #ETH #etc减产 $BTC $ETH , but you need to watch the market when opening a position at this position

No one can go all the way to the end, but don't forget your original self. Don't forget your original intention. It can be seen that the market has finally made some moves this Monday. After opening my eyes and taking 700 points in the morning, I still maintain a bearish mindset during the day. I took 1,000 points in the afternoon. After entering the factory in the afternoon, the market rebounded too much. It stretched all the way to around 63,300 and fell back. This short position was indeed swept out. Another short position in the evening took another 400 points out. The overall layout of 4 orders on Monday is quite satisfactory. Continue to sprint for consecutive wins.

Judging from the current rhythm of the day, the market is still in a weak downward state. Although there is a rebound during the period, the rebound strength is minimal. Although there is a stretch during the day, it can be seen that the green energy column of vol has almost ended. It is currently under pressure at the previous high point of the four-hour level. The midnight mindset continues to be bearish. #美国4月CPI通胀数据即将公布 #山寨币热点 #BTC走势分析 #ETFvsBTC #etc减产 $BTC $ETH

Big cake 63300-63600 short, down to 62000
Auntie 2980-3000 short, down to 2890

A9 investors tell us 10 strategies to keep profits

Every bull market will make people rich, but they will soon lose everything due to their inflated mentality. Next, here are my 10 strategies to keep profits and stay at the table in the market:

1. Smart diversified investment

Cryptocurrency is a high-risk field. Don't put your money into 1-2 currencies. Even projects like #LUNA, which were once ranked in the top ten in market value, will be reduced to zero overnight.

A reasonable investment portfolio and weak correlation are the key to maintaining a balanced position. At the same time, determine your investment portfolio and quantity limit according to the size of funds and risk tolerance.

500,000-500,000 USD, about 10
500,000-5 million USD, about 20
More than 5 million USD, less than 30

And focus on the areas you are familiar with and the core narrative of each cycle, such as the core narrative of 2023-2025:#AI#RWA#DEPIN#GAMEFI #SOL#. #MEME

2. Regular portfolio rebalancing

Investing is a hard thing, especially for cryptocurrencies, which change too quickly and are ever-changing. It is crucial to keep regular tracking of holdings + portfolio rebalancing.

Use the data dashboard to connect your holdings to your customized dashboard through the on-chain API interface data. Follow the official Twitter and community to see the latest developments discussed by everyone.

Portfolio rebalancing, the income accounts for a large proportion of the position, and it can be appropriately dynamically balanced. Remember that the market is rotating, and it is important to cut peaks and fill valleys.

3. Risk management
Develop a practical risk control strategy, with #BTC存 as the main tone of reference. And clarify the risk control principles and management plans. Set the retracement threshold of the overall position to avoid wasting time. Remember that the risk control manager and the trader or researcher should be independent of each other.

Or simply use computer automation to execute, and avoid emotional and nostalgic feelings when doing risk control.

Our strategy is to issue a 20% retracement warning for the overall position and execute a liquidation at 30%. BTC is used as the benchmark.

4. Be cautious in greed and greed in fear

The market is facing FOMO and FUD all the time. Due to the unregulated environment of cryptocurrency and the development of social media, various voices emerge in an endless stream. But investment is often anti-human. For example, on May 1, BTC was below 59,000, and FUD was very serious. Many people saw 50,000 or 40,000, but there was no logic, and they just drew technical lines to talk about things.

If technology can beat the market, many people should be millionaires, especially now with the blessing of #AI. So think independently, macro + micro + data + funds, and make comprehensive market judgments with high probability. Determine the investment position based on probability

5. Pay attention to market sentiment

In the market, we often make two kinds of money, one is emotional money and the other is cyclical money. The former determines the track rotation, which is often triggered by events. The latter determines the position allocation and makes big money in the cycle.

It is very important to identify the end point and detonation point of the market track rotation. For example, the#RWAfever caused by BlackRock not long ago, many RWA projects, in just one week, 3-4 times

For example, the#GFI#RIO we often mention. But after a period of emotion, the pendulum effect will dissipate for a while. At this moment, it is crucial to double the principal in time or the dynamic balance strategy of the position.

6. Stay hungry and keep learning

It is very important to focus on your own track. Only take a scoop of water from the three thousand weak waters. Everyone has limited energy and learning ability. It is impossible to be comprehensive and focus on one's own track. For example, our main focus in this cycle is on the fields of#AI#RWA#SOLecology#DEPIN#GAMEFI. Although there are still hot#Restakingtracks,#MEMEtracks, and#modulartracks in the market. But we are less involved.

7. Protect your assets
Safety is always the first priority. It is recommended that users with more than 100,000 US dollars use cold wallets. Any exchange has risks. Only when the assets are in your own hands is it the safest. Learn from large institutions. They always store assets in cold wallets, and exchanges are only trading media.

Only when transactions are needed will they be transferred in and out of the exchange. At other times, assets are in cold wallets. This is the lesson of #FTX. Many people went bankrupt for this, including myself. I also suffered heavy losses.

8. Profit-taking
It is crucial. Every cycle must be planned and predicted in advance, what position to reach, what to do, instead of sprinting all the time. In the market, sometimes you have to rush, sometimes you have to stop, and stopping is more important than rushing.

9. Be patient
Investing is a long-term thing. Take a long-term view of life and think and invest like Buffett.

Always remember to make money in cycles, this is the secret to always winning. The cycle is like a pendulum, never stopping, the world is a serial drama that is constantly repeated, only the plot and characters change slightly, the essence remains the same.

For example, the longest is the Kondratieff cycle, in which multiple Kuznets cycles and Juglar cycles are nested. We have been in recession-depression-recovery-prosperity-recession, just like the well-known Merrill Lynch clock, repeating over and over again. Opportunities are forever, and life depends on Kondratieff to make a fortune, and efforts have little effect.

10. Healthy body and stable mentality
Technology + knowledge can be learned, but it is rare to become a general who always wins in investment. The core is mentality and health. What can be learned is called investment variable variables. Through the 10,000-hour rule, you can become a master or expert.

But the cultivation of mentality is an unquantifiable system. There are innate factors (talented) and the embodiment of continuous improvement. The gap between most people is not in technology + knowledge, but more in mentality.

It cannot be expressed in words, but can only be realized through repeated grief and market trials.

Finally, I wish everyone can reap the profit margins they want, and achieve fruitful results in the 2023-2025 cycle!

If you want to learn more about the relevant knowledge and first-hand cutting-edge information of the currency circle, follow me. Junyangli publishes market analysis and recommends high-quality potential currencies every day.

#etc减产 #BTC走势分析 #新币挖矿 #美国4月CPI通胀数据即将公布 #5月市场关键事件