I do think there is an element of bubble to NFTs with people paying crazy money. Some do have utility in games, but if the game goes away then it's just data. You should be able to download the images in case the site goes down, but I expect anyone can have the file. It's all a matter of what you think having some sort of digital ownership certificate is worth. It is all artificial scarcity like those 'limited edition' plates. A few rich people may decide they want to own this rare stuff and push prices up. I think we will see a lot of companies try to cash in on the fad.
!PIZZA
Yeah, the actual images are stored on IPFS right? I'm assuming with Sol and others that have wallets, you can keep them there.
Cg