I think nobody can control or own the bitcoin system like they can not control and possess the technology by email and the internet. I think Bitcoin is no different than a mobile application or program that offers a personal Bitcoin wallet and allows users to send and receive Bitcoin.
No one controlled bitcoin system because we all know that bitcoin is a decentralized cryptocurrency which means no one is controlling it yet the control of it is the hand of the one who are using it. Now, many people are into bitcoin making it more good in terms earnings and the value of it are affected through the numbers of users who are rapidly increasing so the true one who is controlling bitcoin is us, the users.