Banks do that to, you know, as well as terrorism, so frankly it doesn't matter.
Indeed any form of high value currency attracts the crims. From stones to not too long ago memory chips.
Not sure if OC was around when RAM as over £100 for MB sticks, but if they were, one could say something about such a company funding such activities
(before someone moans, I am not implying anything.
Of course BitCoin is full of crims and tbh you need to have your wits about you when trading as it is intentially completely unregulated and the police are clueless about it generally. The exchanges do require passport and address scans to become verified, but that is easy if you want to give them fakes.
The security relies on the hashing / cryto algorithms that everyones own "computer wallet" decode and share / verify with everyone elses much like BitTorrent shares.