Militants push supporters to donate through bitcoin, police say amid crackdown Bitcoin is the most common virtual currency and is used as a vehicle for moving money around the world quickly and anonymously Updated 04 February 2021 February 04, 2021 20:38 KARACHI: Police in Pakistan say the use of digital currencies, including bitcoin, for international terror financing, as well as crimes such as extortion and ransom, is on the rise as authorities move to crack down on illegal methods of money transfer. Bitcoin is the most common virtual currency and is used as a vehicle for moving money around the world quickly and anonymously via the web without the need for third-party verification.