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.
For clarity sake, bitcoin has never been a form of financial technology being developed for individuals to run their illegal shits rather, it decentralized and anonymous potentialities has been a loophole where criminals feel save to do their shits and hope would get Scott free. But can can that the security networking system of the bitcoin blockchain has been tied stronger which has set upon tracking of transaction and so also the Crypto wallets platforms has advanced it security further than back in the days.
Even up til date, criminal activities has not seem to end and as long scamming and money laundering is real, such illegal activities around the horizon of cryptography won't get to an end.
Note: every financial sectors including the banks are not exempted of the illegal activities we are talking about here.