If you know the trading market, you know this is going to affect negatively the bitcoin ( sell the news) and potentially a very big dump when people see the impact of futures is not so huge
I am hopefully optimistic that with the introduction of T.D.Ameritrade on Monday Dec. 18, 2017 the the Futures Market will bring big pockets, therefore increase the market share. However if it does have and adverse effect, My thinking it would only pull back to the 15 - 16k range, and knowing my product I believe a recovery will happen soon after. I could be wrong, however we all know it has recovered before.