As Bitcoin is a decentralized currency, there is no person or entity who owns or controls all of the Bitcoin on the network. It is possible that some individuals or institutions may hold large amounts of Bitcoin, but it is impossible to know for sure. As for who is currently selling Bitcoin, that could be anyone from individual investors to institutional players. The market for Bitcoin is constantly changing, affected by a variety of factors such as supply and demand, global economic conditions, and investor sentiment. Ultimately, the price of Bitcoin is determined by buyers and sellers on the open market, and anyone is free to buy or sell Bitcoin as they see fit.