In 2018 bitcoin will soar higher. There will be more investors. Eventually the demand will increase again after the holidays. People will start there yearly goals and most likely they will include bitcoin investment in their list. I believe bitcoin price in 2018 will probably be more than $100,000.
I agree that more and more investors and companies are getting interesd in bitcoin thougj 50k$ looks very high amount for btc but we don't know what price may investor continuously traded bitcoin in the market only seller and buyer will determine the price. but im so happy if bitcoin would hit 50k$ or even higher and nothing is impossible in crypto market