A day before his record-breaking auction, Beeple – whose real name is Mike Winkelmann – told the BBC: “I actually do think there will be a bubble, to be quite honest.
“And I think we could be in that bubble right now.”
Many are even more sceptical.
David Gerard, author of Attack of the 50-foot Blockchain, said he saw NFTs as buying “official collectables”, similar to trading cards.
“There are some artists absolutely making bank on this stuff… it’s just that you probably won’t,” he warned.
The people actually selling the NFTs are “crypto-grifters”, he said.
“The same guys who’ve always been at it, trying to come up with a new form of worthless magic bean that they can sell for money.”
Former Christie’s auctioneer Charles Allsopp said the concept of buying NFTs made “no sense”.
“The idea of buying something which isn’t there is just strange,” he told the BBC.
“I think people who invest in it are slight mugs, but I hope they don’t lose their money.”