Yep, they are for illegitimate uses. They are also for privacy uses.
What people don't understand is that with creating privacy coins for good uses, they also help scammers skyrocket their results. The average Joe in the middle, who is neither of them is the victim.
I recently read some stats that say that at least in the US not that many people use BTC for illegitimate uses, that is in fact less people than the ones that use fiat and paper.
Basically, they are using bitcoin to many any deposit and transaction to the exchange site. because i was thinking about they are all only interested to trade in the crypto rather than stock exchange.
Because the majority of illegitimate user try to use another way just like privacy coin.