I spent three days figuring out this concept, and today I will explain it to you using the example of eating hot pot:




Imagine you and your buddies organize a hot pot gathering, and four people each take a small notebook to keep accounts. Who ate how much tripe, how many bottles of beer, and how much everyone pays at the end must be recorded on the spot. This is much more reliable than sending red envelopes in a WeChat group—this is the most primitive form of blockchain: everyone has a complete ledger in hand.



Every time we finish eating hot pot, everyone writes down the day's expenses on a new slip of paper, signs it, and stamps the date. If someone tries to secretly alter last month's record, they will find that all the subsequent slips' dates do not match. This stack of slips represents the 'blockchain'—blocks (each slip of paper) + chain (linked in chronological order).



To put it simply, this is an anti-cheating accounting system. It was originally used for Bitcoin as an 'accountant', and now it turns out this thing can do much more than just manage money:

✅ No need to find a bank to transfer money (for example, saving fees on cross-border payments)

✅ Contracts take effect automatically after signing (security deposits automatically transferred after rental expiration)

✅ Whoever's data, whoever controls it (your diploma cannot be altered by others)

✅ Websites can run without a boss (decentralized e-commerce)



Not all ledgers are freely accessible:



Public ledger: like a community bulletin board, anyone can browse (Bitcoin, Ethereum)
Private ledger: like an internal company ledger, only employees can see it (alliance chains like AntChain)




Here's the key point! This thing is overturning our trust model:



In the past: trust banks/government/large companies
Now: trust mathematical algorithms + collective supervision

Just like a WeChat group relay, everyone can see everyone else's registration, and no one can sneak in.



Real application scenarios have already landed:

▶️ Second-hand housing transactions: land registration information is directly put on the chain, and intermediaries cannot falsify it

▶️ Live streaming rewards: money goes directly to the streamer’s wallet, and the platform cannot take a cut

▶️ Job resumes: work experience is on the chain, HR can verify authenticity in seconds




My conclusion:

Blockchain is not a cover for speculating on coins, but a genuine trust tool. It is like the early TCP/IP protocol of the internet; although invisible and intangible, it is reconstructing the trust system of the entire digital world. Next time someone says you are dealing with virtual currency, you can reply: 'I am participating in building the future trust highway.'




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