(FILES) In this file photo taken on October 26, 2020 this photograph shows the logo of US social network Twitter displayed on the screen of a smartphone and a tablet in Toulouse, southern France. Fifteen years ago Jack Dorsey typed out a banal message -- "just setting up my twttr" -- which became the first ever tweet, launching a global platform that has become a controversial and dominant force in civil society.The short tweet on March 21, 2006 by the Twitter CEO is now being sold at auction, with bidding reaching $2.5 million.

 / AFP / Lionel BONAVENTURE
The first tweet sent 15 years ago by Twitter boss Jack Dorsey has sold in a digital auction. AFP

Twitter boss Jack Dorsey sells NFT of first tweet for $2.9 million