Most likely the people running sex-trafficking rings are not stupid enough to use something like Bitcoin as you don't want to have a public ledger with all your

Most likely the people running sex-trafficking rings are not stupid enough to use something like Bitcoin as you don't want to have a public ledger with all your transactions fully visible on the internet if you're doing stuff like that. Probably Zcash is a more likely contender for that, as it is the only cryptocurrency offering fully anonymous transfers together with normal, public transfers in the same wallet.