i think the price of bitcoin will rise sooner than the beginning of 2019, for specific is by the last 2 months of 2018, bitcoin will hit 10.000$ and rise even higher.
No one actually depicts the fact that it might rise sooner before we even get to 2019, but we also have to understand that this rise sooner is still subjected to how far it goes anyway which at the end of 2018 I really do not expect so much compared to what we had last year. We have huge resistances above us and it would take some pretty solid and market driving news to be able to take them out of the way to even be able to get as high as the previous ATH.
But, it is still all bleak at the moment, and whatever happens before the end of the year will determine what we should be expecting at the beginning of 2019.