Everything is very simple. Those who want a high price for bitcoin - already have bitcoin. Who has no bitcoin and wants to buy, they want the lower the better.
Most of us here are just speculators and we want to make money by investing in bitcoin. "Money is never too much" so we (speculators) are not satisfied with even a high price, still we will need more and more. Such are the people and their greed.
I like how easily outlines and well explained this is. I am already holding bitcoin and other coins so I want obviously want bitcoin to go up so I can make profit from it and also there is the fact that when bitcoin goes up then the prices of the other coins that I am holding start going up too so I can make profit. The only people who want low prices from bitcoin are the people who don't have bitcoin and want to buy in.