NFT is a trend and just like other trends, it will get to a point that the interest will slow down and once another trend starts coming up, people will leave it for another. Also, it depends on the lasting impression and impact the NFT had in the crypto space, that is, if it is a very lucrative and good one, it will still be around although won't be much but people will also feel it's presence; a good example of this is the DeFi trend which is still very much around till today.
Lastly, many NFT platforms are coming up and now the hype looks like it is going down, you ought to be careful because a lot of scammers will launch theirs in order to make due of what's left. In addition, the best way to benefit from any trend is to join as early as possible.