1. Jack Dorsey: the CEO of Twitter and Square , His love for BTC dates back to 2017 when he started advocating for the king coin. Dorsey was unfazed, calling Bitcoin the future world currency, despite the digital currency being at its lowest point in several years. In March 2019, Dorsey returned to spending several thousand dollars each week to buy bitcoin, and in October 2020, Square bought 4,709 bitcoins under his supervision.