Who in the world controls the bitcoin? I don't understand where it appeared and how it began to be one of the official currencies?
Who controls the course of Bitcoin?
I guess it's the investors, who control the course. Users, in fact. Including you, if you personally buy and sell btcs. But it is important to understand, that your control over Bitcoin is proportional to how much you own.
investors or users themselves, if the set of users with large capital to do a thing will certainly give effect to the price of bitcoin, The controls exist on the user's own dude