Sorry to burst the tax evasion bubble, but it is pretty easy to stop cryptocurrencies. Just require KYC at points of entry and exit into the ecosystem.
Not taking either side, just pointing out this fact.
Even then you’re just turning your goods into cash. Which is still difficult to spend when buying high value assets like property. At some point if you’re a criminal that wants to spend their cash, and live in a developed country you need to turn your crypto into clean fiat in a bank account, or prove the crypto didn’t come from illicit sources.
The only reason piracy isn't enforced is because it's largely a civil, as opposed to a criminal matter, which constrains the tools available to copyright holders to go after pirates. Criminal investigations, in comparison, are not hamstrung the way that Warner Brothers going after someone downloading The Matrix is.
You significantly overestimate the financial incentives for building special purpose hardware solely for the purpose of participating in a criminal economy. That would be trivial for the police to shut down, because hardware manufacturers have a very conspicuous physical presence.
There's a reason nobody sells 'piracy-solutions-in-a-box'. It's because you need factories to build those, and you can't exactly own a factory in secret.
Piracy boxes are a thing. There are Android TV set top boxes loaded with all kinds of piracy software being sold at a premium, and they manage to do so without factories.
Similarly, you don’t need a factory to build a Bitcoin wallet if (hypothetically) you can no longer use a general purpose computer for that - a microcontroller and hobbyist-level tooling is enough to build one.