I think it is difficult to find the right rules, where payment for crime is something that is difficult to avoid by a currency including Bitcoin because what determines is the behavior of the holders.
Maybe many think that Bitcoin is a currency that is very suitable for crime and illegal activities because that is anonymous, Of course, its wrong. Bitcoin has the right technology to combat that thing. Blockchain allows that because it is open source.
Sometimes I doubt the reason for rejecting and blocking the bitcoin payment system by the government is because of the anonymity possessed by bitcoin which is often made into an illegal activity payment instrument. Because... isn't KYC and AML more than enough!?