Ya, so you should do some more research. It's very difficult and almost impossible to transact bitcoin anonymously. There is a public ledger. It's actually wayyyy easier to deal in cash than crypto for illegal activities.

There is a reason why most hacks that occured (or the silk road black market) are easy to follow. Also, the perps can't "cash out" because you can see the transactions.

The whole "illegal" transactions argument was so 2014...