Who can make an NFT?
NFTs are Beanie Babies, but instead of a limited edition toy, you get a barcode. Anyone can make them for anything, so there's no scarcity. They're pogs you can't play with.
And just like pogs, when Pizza Hut and Lunchables started making pogs, it was over. Pizza Hut and Lunchables NFTs are coming.
I'm going to go sell an NFT of Jack Dorsey's fist Twitter post NFT.
Any decently print operation? The MLB would come after them if they tried to sell them, of course, but it's not like pictures on cardstock is a tougher technology to recreate than NFT.
Both are only worth something because of their provenance, ease of manufacturing is irrelevant.
NFTs aren't scarce. Anyone can make them for anything. I can sell you the couch I'm sitting on as an NFT.
If I own a Picasso, I could burn it, have my tigers urinate on it, or make sure no other human ever sees it again. I can do whatever I want. What exactly can I do with Jack Dorsey's first tweet? Get him to delete it? Change it into an ad?
There's no legal framework behind NFTs. Ownership is meaningless. If you bought my couch as an NFT, good luck coming to get it.
Also, when the cryptography behind NFTs is broken (and it will be!), what happens to the ownership? If the chain switches algorithms, not everyone will update their keys. After breaking the old scheme, ownership will instantly be impossible to prove.
Next you have the copycats, people selling shovels, and uber drivers investing in it.
Then comes the eternal stagnation.
These are worth jack shit except to the temporary evangelicals buying the craze. They aren't rare, you have to explain it ("I wonder if anyone knows I own the NFT of this song"), and the crypto will be broken before the holders update their wallets to safer algorithms.
Nobody will ever honor your CryptoKitties. You can't use them in Nintendogs or Neopets. The creators won't build a compelling platform for them and they'll simply die from waning interest.
These are moon certificates, except with crypto.
I expect quantum to pick up major steam, especially if major state actors want to screw over the Bitcoin network.
Personally, I don't care for baseball cards, I value them about as much as the paper they're printed on. But collectors like them, so if I found one (I dunno, dropped in its sleeve into a tip jar?), I'd check if someone else wanted to pay for it before I started using it as a bookmark.
Same deal with NFTs. The difference is they're brand-new and white-hot, and it remains to be seen if they have enduring value.
My guess: NFTs will continue to be valued, but the vast majority of those which exist right now (and of every NFT ever minted) will be worth so little that it isn't worth the transaction fee to transfer ownership.
The John Cleese Brooklyn Bridge though? It's a great joke! Might not be worth whatever it goes for down the road, but it will probably still be worth something.