Twenty One, a Bitcoin treasury firm supported by Tether and Bitfinex, has successfully launched on the New York Stock Exchange (NYSE) with a substantial $4 billion Bitcoin treasury. The company, which holds 43,500 BTC, went public through a Special Purpose Acquisition Company (SPAC) merger, marking a significant milestone in the cryptocurrency sector. The firm's CEO, Jack Mallers, emphasized the transparency of their holdings, which has been confirmed through on-chain verification. This move is strategically aimed at attracting institutional investors by providing a verified and secure structure for Bitcoin investments.