some are saying that some exchanges might increase the price and decrease as they wish. I really hope this is not happening.
In the end it should be offer and demand
Exchanges do play a vital role in up and down of the prices. And like you have said the fee factor matter a lot while deciding the coming price of a coin. On this basis, people are taking the thing and going off of it. Like if bitcoins are high in fees and people cant afford this thing, how they can continue. Rather they left them. Hence the ultimate results are effected, prices get down immediately.