The bids on Dorsey’s succinct first tweet “just setting up my twttr” from March 21st, 2006, quickly escalated, and Dorsey later said he would end the bidding on the tweet’s 15th anniversary. According to the time stamp on Cent, Estavi made his final, winning bid on Monday afternoon, and according to Reuters, paid using the Ether cryptocurrency in the amount of 1630.5825601 ETH. Estavi, CEO of blockchain company Bridge Oracle, told Reuters he was “thankful.”

https://www.theverge.com/2021/3/22/22344937/jack-dorsey-nft-sold-first-tweet-ethereum-cryptocurrency-twitter