Moving a million dollars by wiring it from your HSBC account is actually much easier than doing it with crypto.
edit: and in the HSBC case the CEO didn't even lose his job!
Why is this true?
The distinction matters.
Some criminals may have easier access to crypto facilities than banks hence activity, or cost is lower that way for the initiated, yes. It doesn't mean volumes of teinted activities is anywhere as big via crypto than it is via fiat.
Common sense could take a guess, but there can't be much certainty as illegal activities happen aren't made in plain sight in either route.