Opinions on Bitcoin
October 2015: "We do not interpret Bitcoin's popularity as having anything to do with the public's view of the Federal Reserve's monetary policy behavior."
December 2017: “It is not a stable store of value and does not qualify as a legal tender. It's a very speculative entity. "
October 2018: “I'll just say I'm not a fan and let me tell you why. I know there are hundreds of cryptocurrencies. But above all, there are very few transactions actually handled by Bitcoin, and most of them are illegal. "
Bitcoin and Regulations
February 2014: "The Fed has no authority to control or regulate Bitcoin in any way."
October 2015: Yellen states that the US financial regulators "should not hinder innovation".
December 2017: “… The Fed is not taking any Bitcoin-related scene except to ensure that the banking institutions we oversee are careful that they properly manage any interactions with the participants.”