Since the downturn, the BTC price has been looking manipulated... in a different way than I expected. Its possible that a group of whales are manipulating the price by selling into price surges so they will profit from their hedges on the options exchange. I think they realized that trying to control BTC on the options exchanges is not really possible but the options exchanges have created an opportunity for easy money for those with a big enough stake to control the price of BTC on crypto exchanges. Just like voting on Steemit... if there is a possibility of easy money people are gonna manipulate the system.