Allocation of resources to try and ban cryptocurrency (or encryption in general) is probably one of the dumbest things ever conceived, probably even more so than the drug war.
Regulators don’t have to ban cryptocurrency use among citizens, they only have to ban/overtax everyone trying to cash it out or to run a legal business in it, to reduce liquidity to a level when it’s more risky or expensive than regular laundering. Cryptokids may then play their encryption penny as usual.
It's entirely easy to make crypto legally useless for legal transactions. The fellow making you coffee won't take crypto if he can only use it to buy drugs. This doesn't mean it will happen but conflating encryption and crypto is poorly considered because we have a long history of regulating commerce.