as far as i can tell very few people want cryptocurrency to be illegal. what people do advocate for is KYC practices at crypto exchanges to protect customers from fraud.
ie. the patriot act argument. I don’t support the redistribution of consequences. Individuals can decide what risks they want to take, including whether they want a KYC exchange or not. If that works out poorly for them, that’s too bad. You’re not held responsible for their losses so you don’t get a say in how they choose to use their own money.