Formerly Square, a financial services and digital payments company led by Jack Dorsey that holds ~8,800 BTC on its balance sheet, builds the Bitkey hardware wallet, Proto mining hardware, and enables Bitcoin buying via Cash App.
Co-founder of Twitter and Block (formerly Square) who became one of the most prominent corporate Bitcoin advocates, funding open-source development.
A Layer 2 payment protocol built on top of Bitcoin enabling instant, low-cost transactions through a network of payment channels.