Twitter boss Jack Dorsey on September 17, 2013 in Detroit -

Bill Pugliano Getty

Twitter boss Jack Dorsey put his very first tweet up for sale on Friday.

The highest bid rose to $ 2 million this Saturday, a sign of the appetite for these new collector's items, virtual objects authenticated on the blockchain.

"I create my Twttr account", had tweeted the founder of the platform on March 21, 2006.

"A unique digital certificate of the tweet"

Jack Dorsey therefore tweeted Friday a link to the "Valuables" site, where amateurs can make an offer.

The highest bid on Saturday - $ 2 million - came from Justin Sun, the founder of Tron, a blockchain, core cryptocurrency technology, and boss of the BitTorrent streaming platform.

“The creator of a tweet can decide to send it on the blockchain to create a unique authenticated version,” explains the tweet auction site.

Buying a tweet means acquiring "a digital certificate of the tweet, unique because it was signed and verified by the creator," the company says on its question-and-answer page - like an autograph.

The tweet remains visible to all

The tweet itself remains visible to everyone, as long as Jack Dorsey or Twitter leaves it online.

Just as the video sequences of basketball matches remain visible for free on the Internet, even after having been sold in the form of an “NFT” (“non-fungible token”), or non-fungible token: a virtual object with an identity, the authenticity and traceability in theory indisputable and inviolable, thanks to the blockchain.

A ten-second clip showing spectacular action by LeBron James, star of the North American basketball league NBA, was sold at the end of February for $ 208,000 on Top Shot.

Non-fungible tokens are all the rage among collectors

Launched at the beginning of October by the company Dapper Labs, in partnership with the NBA, Top Shot allows you to buy and sell these video clips, called "moments", at prices that vary according to their rarity.

Since the start of the year, Top Shot has generated more than $ 200 million in transactions, according to a spokesperson for Dapper Labs.

NFTs have been all the rage among collectors for a few months, to the point that Christie's auctioned, at the end of February, for the first time, an entirely digital work sold using this technology.

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