The U.S. Government Accountability Office wants the Consumer Financial Protection Bureau to keep a keen eye on Bitcoin and other virtual currencies as their use by consumers continues to grow.

The GAO is most concerned about the risks involved with virtual currencies, mainly the near anonymity involved with such transactions, especially for illicit goods and services. The agency asked the CFPB to "take steps to identify and participate in pertinent interagency working groups addressing virtual currencies in coordination with other participating agencies," according to a press release.

The CFPB agreed with the recommendation.