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?
There are two small groups that control bitcoin 100%, the miners and the developers. Either can implement whatever changes they want.
Other may argue the "community" could reject these changes but the community really has no power other than voicing their complaints to those two groups.
Software developers can propose and implement changes to the bitcoin code. Then it is a question of whether the miners implement the changes, changing bitcoin. If a split occurs between miners over a disagreement as to which software should be used, then bitcoin would fork and there would be two chains. Anyone who owned bitcoin would own coins on each chain.
At this point the market of bitcoin users would have to decide which coin(s) they value and how much. Even if most miners went with one version of bitcoin, if actual bitcoin users preferred the coin with the minority of miners, then those miners would reap much greater profits due to the lack of competition. So the miners on the first chain would have a strong incentive to switch to mining the coin with more value.
So I guess you could say the entire market of users has the final say in controlling bitcoin. The developers can try to force a change on miners they don't want, and miners can try to force a change on bitcoin users that the users don't like. But so long as some miners mine the version that users prefer, it is the users (as an entire group) who have ultimate control. And I think that's pretty cool.
