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.
Did you know that since you made this post bitcoin has rise significantly? Bitcoin is serious in the uptrend now and I do follow op predictions and analysis that bitcoin is now following the same price chart that happened in 2017. In 2020 I think it will be and explosive upward movement because of the halving.