UPDATE 7-New bitcoin futures suggest breakneck price gains to slow By: Reuters: Company News December 11, 2017 at 14:26 PM EST * Futures indicate less heady growth to come (Adds comments, updates prices) Read More >> Related Stocks: Amtd Idea Group Bitcoin (Bitstamp) Bitcoin Composite CBOE Global Markets Inc CME Group Charles Schwab Citigroup Goldman Sachs Group JPMorgan Chase & Co