If no one sells and only holds that means the price is increasing steady over time, in my oppinion the people who are not trading but only selling based on the news or minor dump are the ones who shouldnt invest in bitcoin, they are giving cheap bitcoin to people who dump the prices and buy of the panic sellers, big players are playing with the market just to scare these panic sellers, if they all hold the manipulators cant do anything since than they give away cheap coins and someone else will buy them if they dump.