According to Bloomberg, Holder’s department has been increasingly focused on the use of virtual currencies to mask illegal transactions, and told the House committee that bitcoin and other cryptocurrencies “can pose challenges for law enforcement given the appeal that they have among those seeking to conceal illegal activity.”
The DoJ has gotten a crash course in virtual currency crime this year, with cases of bitcoin-related crimes on the rise and the high-profile case against accused Silk Road mastermind Ross Ulbricht grabbing national headlines. Holder seems well aware of the challenges law-enforcement bodies face, stating: “As virtual currency systems develop, it will be imperative to law enforcement interests that those systems comply with applicable anti-money laundering statutes and know-your-customer controls.”