No one has full control, but someone can manipulate the orice specially those who has big volume of holdings. They could make the price suddenly drop. This big holders are the whales, might be a syndicate that want to take advantage of the current run. Their manipulation Might affect the price but for only short term. They still can fully control it.
Although your thoughts are unclear to me, because manipulation is just the same with control but I still got your point.
Yes, still they can manipulate the price, therefore they can control the market.
I know that there are also a lot of factors that can affect the price of bitcoin such as the volume, demand, cost of mining and etc.
Hoping that we can somehow adapt and adjust on what to do to make bitcoin investment profitable.