The answer to this is easy and I am surprised you do not know it already. The founder of Bitcoin, named Satoshi Nakamoto is believed to own at least 500,000 Bitcoins, with some estimates putting this figure at higher than 1,000,000 BTC. This would make him a multi-billionaire and the largest holder of Bitcoin worldwide. You can read his earlier posts here on this forum, although he disappeared and has not posted in years.