Twitter boss Jack Dorsey's first tweet sold for $2.9 million as an NFT

FILE PHOTO: Twitter CEO Jack Dorsey addresses students during a town hall at the Indian Institute of Technology (IIT) in New Delhi, India, November 12, 2018. REUTERS/Anushree Fadnavis//File Photo

LONDON (Reuters) - Twitter boss Jack Dorsey sold his first tweet as an NFT for just over $2.9 million dollars on Monday.

The tweet is in the form of a non-fungible token (NFT) - a kind of unique digital asset that has exploded in popularity so far in 2021.