I do not believe that the price of bitcoin can go out of control. There are people who have a lot of coins. They can't release control over the pricing of their hands. As a result, they can lose a lot of money. It seems to me that they turned the pump on purpose. Perhaps speculators are afraid of futures and preparing to leave the market of bitcoin.
Bitcoin is decentralized one,so no one can control the price of bitcoin.The price of bitcoin is 16,153$,it crossed the 16.1k$.It just an miracle to see this price.Many holders had a very good news and will get their christmas gift for the bitcoin.No one will allow to bitcoin to end,many had inverse their money in bitcoin.