The creator of Dogecoin, Billy Markus (Shibetoshi Nakamoto), mocked NFT after Ethereum merged that stopped mining.

  Billy sarcastically claims in a tweet that since NFT can no longer be held responsible for carbon emissions or the destruction of the environment, people would no longer be able to openly criticise it for its stupidity rather than under the pretext of environmental protections.

    Billy may try to show himself as a non-fan of NFT by describes NFT as a dumb thing. He does, however, have a full collection of NFTs, which is even acknowledged on his official social media profile page.

Billy describes the individuals who use or discuss NFT are "dumb", and yes Billy's profile summary also implies that he is dumb person, not a serious one.