It could have something to do with the decisions on the exchange-traded funds (ETF) being considered soon.  There's a few big players in the game (https://cointelegraph.com/news/barry-silbert-now-competes-with-winklevoss-twins-solidx-for-launching-first-bitcoin-etf-in-2017) and there's a lot of speculation at the moment (http://seekingalpha.com/article/4044517-bitcoin-etf-approved-march-2017-black-swan-asymmetric-risk-reward).  I think there will be a decision making hearing next month (http://www.newsbtc.com/2017/02/06/sec-faces-march-11-deadline-bitcoin-etf-decision/).