NFTs are probably the most interesting and legitimate use of these kinds of computer systems. For example, I could see a lot of value in specialized Yu-Gi-Oh projection card tables installed at game stores that only worked with officially issued NFT virtual cards. Players could rent out their virtual cards to other players and turn their purchases into assets. There are already companies in the MTGO space that rent out virtual cards but the whole trading system is (poorly) managed by Wizards of the Coast and lacks programmability.
I think the biggest problem with crypto is that it was way overhyped for anything outside of having fun online.
It's like meme stocks. It's fun to waste $50 playing some silly online game! It's not fun to waste $50k gambling on something that you think will change the global financial systems.
I also think there's plenty of room for fungible tokens that represent ownership over digital content, eg, buying 4% of the rights to the future profits from the monetization of a digital video, as opposed to the patronage system of platforms like Twitch or Patreon. If we truly are reliving the existing financial system shouldn't we expect to reinvent a marketplace for intellectual property?