Twitter's inaugural tweet, posted by co-founder Jack Dorsey on March 21, 2006, marked its 20th anniversary. The tweet, "just setting up my twttr," initiated the era of 140-character messages and has been recognized by the Computer History Museum and Guinness World Records. In March 2021, Dorsey sold this historic tweet as a non-fungible token (NFT) for $2,915,835.47 to Sina Estavi, CEO of Bridge Oracle. However, the NFT's value has since declined significantly.