Because of the semi-anonymous nature of Bitcoin, its used in ransomware attacks. Hackers breach networks and hold them hostage until payment is made to them. Hospitals and schools have been victims of these types of attacks. However, unlike cash, which was favored by thieves in the past, Bitcoin always leaves a trail in the blockchain that investigators can follow.
With the growth of technology in this century, has been widely misused by someone to commit crimes in the world, now crime can be done anytime is not based on time and opportunity but based on expertise.
Lots of potential frauds committed by a person to gain wealth from the anonymous bitcoin properties, ranging from Hacker, Ponzi scheme, ransom money hostage and so forth.
Tracking bitcoin transaction is becoming easier. The rest depends on the regulations of the government.
It seems correct, but it's impossible the government will move to defend the victim because bitcoin itself is created without existence regulation from the government.