I belive it was one of the triggers that caused this dump.
I though BAKKT will be done in the midst of December 2018 and now has been adjusted or extended on January 2019.
however, Bakkt is could be one of the reason for what is happening now in the value of bitcoin, why it dumped into below 5k$ which is very painful or hurt to anyone who became panic because of this matter anyway. But for sure, after this bakkt bull run is next.
I guess you need to understand that everything is business and those scheduled are not etched in stone. If I remember correctly, I'm not sure if its CBoE or CME last Bitcoin future offerings was adjusted a week earlier. Well, it could have triggered this another dumping, but then again, its only a postponement, I don't know why there's a big fuss about it. It could be manipulation from behind, or it could be the Bitcoin Cash war is not over yet. But there's no point in selling off today, unless you are new to the market and doesn't want your investment to grow overtime.