Are 'dirty' bitcoins a crime hazard?
Could you elaborate on the potential criminal hazards posed by 'dirty' bitcoins? Are these bitcoins obtained through illicit activities such as fraud, hacking, or drug trafficking? How do these bitcoins enter the mainstream economy, and what are the risks associated with their circulation? Do they facilitate criminal transactions, or are they simply a means of laundering illicit funds? How are regulators and law enforcement agencies responding to this emerging threat, and what measures are being taken to combat the use of 'dirty' bitcoins?