You can compare it with the defi hype. But once people realized that the value of NFT really depends on what it is really representing for, slowly they will die down. However, since they are just starting to hit the market, expect that most of the NFTs will be overpriced in the market. If you want to get a hold one of these NFTs, make sure that you are paying for something that will really be valuable years from now. Because for sure, a lot will try to sell worthless NFTs for thousand bucks or more.
Worthless or not, overpriced or not - each item has its own buyer. I suppose that compared to DeFi, NFT wont die. They will be like comix, baseball cards, stamps, pokemon cards and etc. They dont have a real value or real usage, but fans and collectors are willing to pay bags of money for old and rare items.