Buterin: Validating all nodes is very important and helps get rid of bad miners.

Buterin reposted the announcements he tweeted in 2017, which at various times at one point in the BTC camp believed the whole investigation to be crucial. In the article, he said that the blockchain's approval mechanism and user-side validation make it difficult to change the rules of on-chain assets, which increases security. And this security is similar to the level of decentralization of users. Coins that are only mined with a single miner today are different from media like PayPal. Because network interference and the time to switch to another network is only better when many users agree, the common ground may be forced to change policies, freeze funds, provide poor quality services and increasing prices. The whole mechanism is beneficial for the operator. . User proof of the blockchain means that for minors who wish to commit malicious acts, the system will eliminate that maliciousness at the process level and the entire network will benefit users.