Nobody could really predict what will happen to the bitcoin price in the future. But in my opinion, bitcoin will slowly lose it's dominance over the other coins, because it's tech is outdated. The fees and confirmation times are not acceptable except for speculating peoples, there is no way it could be used for daily purposes. The "normal" people will slowly learn that fact, and will turn to other coins, better suited for real world use.
Also, the energy required for mining bitcoin is a strong concern, I don't think it is sustainable. In the long term, the world needs a more energy efficient crypto.
So, this is just my opinion, but if nothing is done, bitcoin could lose much of it's value in the future, and others coins would benefit of that.