I don't even necessarily think a 'war on crypto' is needed. The problem is that crypto seems to function as a get out of jail free card for very straightforward financial crimes: you just do the financial crime, but apply a thin veneer of 'but with crypto' and the legal system is utterly bamboozled.
Crypto's problem is that when the law is updated to deal with these stunts, it's suddenly just a crappy version of the existing financial system.