I think bitcoin doesn't follow its path in 2017, and I'm not sure whether bitcoin will be high in December, and bitcoin still needs more time for it, my estimate is that bitcoin will rise in 2020 or 2021.
Btc might break 2017 high this year itself and has a long way to go as well considering the future growth and Formans is concerned which means that price will continue to move up the ladder and grow from their onwards .