No one currently owns bitcoin, and no one can develop and upgrade it. Actually, there are still a lot of altcoins far better than bitcoin. alts like LTC, XRP, CS, ... have very fast transaction speeds and cheap fees, because their network is really good and can handle millions of transactions in just a few seconds. but its value cannot be equal to bitcoin because it has control. Here people don't like having to hold any kind of assets under control, which is why bitcoin is so expensive. It was all in Nakatomo Satoshi's calculations.