If an entity is large and powerful enough, is it possible for it to gain a monopoly advantage and manipulate the rises and falls of the virtual currency market?
I think so. People can manipulate if they know how to. Actually, whales or big investors is doing it at the moment to the price of ethereum. if you will just observe the price of eth it has constant drop and rise of price which lead me to the conclusion that someone is playing with the price of it.