Even if what you're saying is true, how do you supposed we "ban" cryptos or stop them? As a person who works on software, you'd have to realize how non-trivial it would be to stop.

What about banning people from going for a drive just for fun, or on a holiday via aircraft ?

It's a lot easier for governments to ban coal fire power stations and fracking replacing them with renewables and hydrogen storage.

This is actually something we can control and do without taking over people's freedoms.