I think it has something to do with the news of it going mainstream, causing it go even more mainstream.

https://www.cnbc.com/2017/11/27/bitcoin-exchange-coinbase-has-more-users-than-stock-brokerage-schwab.html
https://www.cnbc.com/2017/12/06/bitcoin-tops-13000-surging-1000-in-less-than-24-hours.html
https://blogs.wsj.com/moneybeat/2017/12/06/bitcoin-tops-12000-and-is-well-on-its-way-to-13000/
https://twitter.com/FoxBusiness/status/938556132074967042




There aren't that many coins in circulation remember this and there is definitely a demand increase right now.


Fox news treats it as a stock even.