In the 6 years, I'm in the crypto space, this type of question raised over and over again.
Since I got into crypto, I saw the rise of ICO, STO, IEO, DeFi, and now NFT.

In my humble opinion NFT gonna stay with us, but the popularity might decrease once a new fundraising method will appear (and if you look at the short history of the crypto space, it will probably happen).

Now NFT popularity is still growing.
Here's a google trends search I just ran:




Look how the popularity of NFTs already surpassed the ICO bubble in Jan 2018




As for now, it seems like NFT is still on the rise. Since I'm working in a Blockchain PR
firm, I can also tell you that many NFTs owners approach us to run a marketing campaign for their art, and the number of people who approach us just keeps growing. Companies/individuals can afford a PR campaign mostly after they have a budget for it. This gives me an indicator that the NFT space direction is UP.

Here's the link for the search I made on google trends:
https://trends.google.com/trends/explore?date=2016-01-01%202021-10-23&q=NFT,ICO,STO,IEO,DEFI