Whatever it is that they are, most of them are quite funny. I see some NFTs that are looking so funny, but the owners sell when they are very popular figures, you will see them being able to sell it at a high rate easily because there would be lots of people who would want to buy the NFT from them and the auction will keep going until they reach a really high number and it becomes owned by the highest bidder.

Although I have seen quite a few of them that are really cool and I would say that they are worth that. Saw an artist once on Twitter that made really cool paintings and selling them as NFTs through Twitter. He never had much followings, but due to how good his work his, he was able to get retweets and lots of bidding on the artwork until he arrived at a high price.