The characteristics of blockchain are: decentralization and irreversibility.
Does the blockchain have to be irreversible?
The blockchain as a whole is an anti-government thing, a product of extreme anarchism in political practice.
When this kind of thing needs to be changed, it has already shown that he does not have the ability to change. For example, the blockchain behind Bitcoin can only trade seven transactions per second. When he wants to expand and change his When the basic agreement was established, there was a huge tear inside, and different people had different opinions, and they fell into a state of near paralysis.
If compared to each block is a cell, all cells make up the human body, and if every cell is free, the human body will disintegrate.
Therefore, the freedom of decentralization seems unreliable and inefficient, and the actual scene of the blockchain is difficult to find.