People buying so many NFTs because they were adorable and people could make a lot of money flipping them that they clogged the Ethereum blockchain. NFTs have a lot of advantages, one of which is that they enable digital artists to claim ownership of the process. It used to be difficult to make money from files that people could freely download and distribute.
I will go with this, NFT can be adorable and interesting, at the same time they can be profitable. What more is needed for people to get hooked?
Probably not many NFT projects will survive the test of time, but some projects are here to stay I believe and that's what makes NFT market still interesting to many people.