This round of the bull market in the cryptocurrency world has indeed been quite torturous. Only BTC is rising, and the basic rhythm is as follows: First stage: BTC breaks new highs for the first time, a portion of altcoins also break new highs, and most see significant increases; Second stage: BTC retraces by 20%, others retrace by 50%. Third stage: BTC breaks new highs again, while other coins are barely alive and only rise a little. Fourth stage: BTC retraces by 30%, others are cut in half again, with most retracing by over 60%. It's a cycle of four seasons. Fifth stage: BTC approaches previous highs, while other coins are cut in half compared to their peaks. In summary, BTC repeatedly sets new highs, while others repeatedly set new lows. Holding BTC can be considered worry-free, while holding other coins is nerve-wracking. If one had only held BTC a year ago, it would have at least multiplied by five times. In the next cycle, remember to only buy BTC and avoid others. However, based on previous patterns in the cryptocurrency world, it's undeniable that other coins tend to rise more than BTC. The issue lies in the timing; that period has not yet arrived. So, seeing the current situation, if you didn't invest in BTC in the early stages, it doesn't make much sense to invest in BTC now in the mid-stage. It might be better to invest in these mainstream coins that have dropped significantly, as their rebounds may be more pronounced, and ultimately their gains could match or exceed BTC's. Recently, ETH has seen a surge, but I feel there’s no need to excessively hype Ethereum's prowess. It has dropped so much; its lowest price has already fallen to the peak levels of January 2018, which is quite terrifying. One can only say that holding ETH carries no significant risk, and it should be fine to continue holding. Saying it has risen is somewhat exaggerated; it’s just that other mainstream coins have also risen by 50%. One can only say that when ETH rises, the altcoins have hope. Currently, it feels like the altcoins will only truly emerge from the shadows in June or July, and a bull market will surely come. For now, we can only prepare our positions and wait. The best entry time in the cryptocurrency world is very brief, and the best profit time is also very short. Not selling at the best timing can lead to long-term regret. The movements in the cryptocurrency world are not flat plains, not hills, not oceans, not rainforests; they are more like towering mountains. In the valley, you can see the peaks above, but you cannot know how deep the valleys behind the peaks are. The real cryptocurrency world is even more perilous, because you have no idea what position you are in. Only after you have walked through it can you stand from a god's perspective and review it. This is truly an adventure.