Because: to expand capacity! In layman's terms, it is to expand the capacity of the blockchain. Bitcoin transactions are based on the blockchain. The size of the block limits the number and efficiency of transactions. At present, a block of Bitcoin is 1M, and a transaction is 250 bytes or more. A large influx, the backlog of Bitcoin transactions and network congestion have become big problems, and 1M blocks are simply not enough! So to speed up transactions, Bitcoin's top priority is to expand capacity. Bitcoin is decentralized, and no private individual or a group can directly make decisions, so the entire bitcoin block becomes a battlefield, and the groups start to grab territory. Everyone thinks they are right, but they can't convince each other. N concepts have launched N expansion plans, and the plans cannot be unified. In fact, to put it bluntly is that each team has its own personality, let others go their own way, so it has evolved into a fork. Hard fork (official explanation): When the bitcoin block format or transaction format changes, the unupgraded node refuses to verify the block produced by the upgraded node, but the upgraded node can verify the area produced by the unupgraded node Block, and then everyone continues the chain that they think is correct, so it is divided into two chains. (Personal explanation): Generally speaking, like a traffic jam, a road is blocked, so everyone decides to change to a road that is not blocked. The original road was abandoned, the key is that even if it is abandoned, other cars Must follow and force the team, some people disagree? Ok, two shots apart, and the two parallel lines never see each other. Advantages and disadvantages: Hard forks are not compatible with the original Bitcoin network. If some people do not support hard forks, Bitcoin will generate new currencies, and there may be more than one new currency. btc1, btc2, and btc3456789 can all happen. Forcing the station to start, the user will be forced. In the end, what kind of currency will I trade? Patients with selection difficulties will definitely collapse; of course, correspondingly, the user's choice has become larger, and they can choose the tokens of the development team they trust. Soft fork (official interpretation): Soft fork refers to the data structure of bitcoin transactions (this is the widely-consensed “consensusâ€), and the nodes that have not been upgraded can verify the blocks produced by the upgraded nodes. And the nodes that have been upgraded can also verify the blocks produced by the nodes that have not been upgraded. (Personal explanation): For example, there is still a traffic jam. This road is blocked, but I am used to this road. Let ’s not give up and do n’t give up. We will build another auxiliary road to help the main road divert and congest. Will there be traffic jams after the side road? We cannot predict. Advantages and Disadvantages: Soft fork will change the settlement method of Bitcoin, make settlement faster and have better compatibility. At least some functions of the previous version are available, no upgrade, and the original block and old block coexist. For the miners, the profit method of charging fees is not affected, and the difficulty of acquiring bitcoin (mining) has not changed. If Bitcoin really forks, as an ordinary user, the biggest risk is replay attacks. What is a replay attack? If bitcoin is split into one or more bitcoins, such as BTC1 / BTC2 / BTC3, etc., each bitcoin account will have a corresponding number of all forked coins according to his bitcoin balance. Because the address, private key, and algorithm on each chain are the same, and the transaction format is also the same, the transactions initiated on one of the blockchains can be completely re-broadcasted on the other blockchain, and may also be Get confirmed. This is the "replay attack". Simply put, when you transfer BTC1, your BTC2 / BTC3 may also be transferred at the same time. However, at present, many bifurcated coins have been subjected to two-way anti-replay attacks to avoid the risk of replay attacks after the fork. World Data IDC provides global overseas server rental hosting for Hong Kong servers and US servers. It is the preferred brand for server solutions such as regional chain, direct sales, streaming media, foreign trade, and games. Tianxia Data has provided blockchain server rental hosting solutions for many enterprises and supported their blockchain technology research! Please consult online customer service for details! 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1. Why did Bitcoin fork?