Well f trump decides to put some money into bitcoin that can surely make bitcoin price jump.
I dont know if he will though. He's kind of invested in the old financial world.
He's obviously not going to announce himself going to buy coins beforehand. If he ever plans to buy Bitcoin, then it will happen silently, which after that he could start showing some Bitcoin friendliness. But I highly doubt that he will do such a thing now he is the president of the United States. Bias is something he can't be associated with at his current position.