Usually when you sell something, there are a bunch of legal rights that go along with the sale. What exactly did this guy buy? The right to look at the tweet? The right to restrict others from looking at it? The copyright? Any advertising dollars which flow because of that tweet? What?
He bought the bragging rights to say "that URL of that image of that tweet, if you look at this particular public ledger, you'll see that the ledger says that I own it!"
If the NFT craze has shown anything, it's that too many people don't have any understanding of the law. They don't seem to know what "own a thing" means - neither the "own" part or the "thing" part...
Usually when you sell something, there are a bunch of legal rights that go along with the sale. What exactly did this guy buy? The right to look at the tweet? The right to restrict others from looking at it? The copyright? Any advertising dollars which flow because of that tweet? What?