One should be very careful with NFTs now. The hype around this sphere is calming down and you can easily notice one day that you NFT-tokens worth nothing

This is what I was going to say as well. NFTs are young still. Who knows where they will go. Assuming governments finally start accepting Crypto then NFTs will be a great use case for records. You could have your passport, health card and information stored as NFTs on the blockchain.
From a current platform side of things, it is really fun to watch how some companies are doing with NFTs. The biggest use case currently is NFT related gaming. I love seeing projects like NFT Draft coming out (later this week) that are using NFTs on WAXP to push through normal NFL "Drafts" and make it a fun game. Winning massive money prizes are nice as well.
I love WAXP too personally because they're really great and no withdraw fees also recently they really known because they just list on Binance from what i see. And American football players as NFT? Why not? I mean i love American style of Football, really great and we can compete against each other on Tournament. So i cannot wait for those tournament and see who will have a chance to take the huge prize pool of $15k. Check this huge NFT Project