Does crypto really need to be controlled?

The natural reaction of any crypto enthusiast is: «What?! What regulation?! Forget it!” However, reasonable arguments sound in the rhetoric of state representatives: «We are good guys! Our task is to protect you from bad guys, and in general, we are for all the good! » The problem is that crypto enthusiasts do not believe in the good intentions of states, and they have good reasons for this. »
Is there optimal scheme for controlling cryptocurrencies?