> Not in the way you mean it, no. Otherwise industrial-scale bitcoin miners, situated near power plants, wouldn't be able to operate in the open at all, yet they do. Without making any moral judgement one way or the other, China works differently than is generally understood by the West.

Well, the western understanding is that it's a corrupt country where the powerful and well-connected can openly flout the law for some time - until they misread a shift in power dynamics and it becomes convenient to prosecute them. I'm sure that's not the only paradigm through which these things can be understood, but it doesn't seem inaccurate either.

> I do think it is important to recognise that criminals already use existing monetary systems quite well, and that fully-public blockchains have an audit trail that investigators could only dream of compared to plain cash.

Well it's not like cash is particularly clean - if someone wants to pay or be paid in cash only, I would see that as a sign that things were probably not entirely on the level. Presumably criminals continue to use cash in parallel only use cryptocurrencies where they gain an advantage from doing so - but there are plenty of cases where cryptocurrency does offer big advantages for crime (and all of the reasons people give for using cryptocurrency - sending money internationally, avoiding reporting requirements - seem like crime-friendly things). Even the traceability you mention seems to be seen as more of a bug than a feature by crypto advocates.