I think it's good to prevent criminal acts and scam ICOs. cryptocurrency was created decentralized no one can control. but if I only regulate it, I don't think it's a problem. because crypto is anonymous so it is vulnerable to being used as a crime tool. KYC usage rules are also good for avoiding illegal users. so the government needs to regulate that crime cannot be avoided and the government can also provide security services for crypto investors so that their wallet is not hacked. and the government can also take taxes from crypto profits so that between crypto investors and the government benefit each other.