In previous years, Bitcoin was known to be involved in many fraudulent activities such as Silk Road, which has been an illegal Darknet market for drugs and weapons. Bitcoin was a big strategy by criminals but luckily, Bitcoin has become more mainstream and criminals were caught. Today, Bitcoin is known for being a reliable digital transactions asset but still some Bitcoin is involved in criminal activities.
There are 2 sides to almost literally everything and as a result of that you just can't stop the inevitable. Yeah we should actually promote making use of bitcoin for the right things as it would improve both bitcoin adoption and also strengthen the network. However we still can't totally remove cases of scams and hacks which are even infact of the most wrongly used aspects of bitcoin.
Infact it's not even a new gist to see cases where stolen funds are lost track of when converted to bitcoin and mixed in some cases.