Hacker Pleads Guilty of Stealing $365000 Worth of Bitcoin from Darknet Criminals
cointelegraph.com
cointelegraph.com
The funds weren't stolen from darknet market operators but from users of these marketplaces. The article asserts the pishing victims could utilize the money for illegal activities. It's likely the stolen funds would have been used to purchase drugs which does not make the purchasers cybercriminals.
It seems dangerous to stereotype people only because they use a certain technology (the darknet).