https://www.reuters.com/article/us-usa-treasury-yellen-fintech/yellen-says-treasury-will-fight-misuse-of-cryptocurrencies-foster-innovation-idUSKBN2AB01L

U.S. Treasury Secretary Janet Yellen on Wednesday warned about an "explosion of risk" related to digital markets, including the misuse of cryptocurrencies, but said new financial technologies could help fight crime and reduce inequality.