No one. Bitcoin is a decentralized network, every one control bitcoin.
Maybe you should try to search some basic information about bitcoin

That's the idea. Bitcoin is a decentralized network and everyone controls bitcoin. But is it absolutely true?
From what I know, the chinese miners are able to control the price of bitcoins whenever they want because they own a high amount of percentage of bitcoins and if they decide to dump, well, you know what's going to happen and if they decide to pump, well, pump it is!