I wonder how big the affect on bitcoin price will be when futures trading starts on the 18th of dec http://www.cmegroup.com/media-room/press-releases/2017/12/01/cme_group_self-certifiesbitcoinfuturestolaunchdec18.html?utm_source=TWITTER&utm_medium=social_post&utm_content=20171201&utm_campaign=bitcoin