Looking at the graph today it seems like the increase rate of Bitcoin has been rapidly great, it grew 17 times from the beginning of the year. If this momentum continues 2018 will be a good look for btc. It may sit at $50k through out the year. There will be a huge chance for price correction on January, but I think it wont be a hindrance for Btc to continue its increase. Every year btc is always increasing, lets just hope btc will make another spectacular run.