I doubt a random internet commenter can persuade you, but LLMs and tools built around them are fundamentally different from NFT/crypto.
NFTs/Crypto are just ways to do crimes/speculate/evade regulations. They aren't useful outside of "financial engineering." You were right to dismiss them.
LLMs are extremely useful for real world use cases. There are a lot of practical and ethical concerns with their use: energy usage, who owns them, who profits from them, slop generation, trust erosion... I mean, a lot. And there are indeed hucksters selling AI snake oil everywhere, which may be what tripped off your BS meter.
But fundamentally, LLMs are very useful, and comparing them to NFT/Crypto does a disservice to the utility of the tech.
> They aren't useful outside of "financial engineering."
Without disagreeing with your overall point in 99% of cases, we did actually have a good use for pinning things in the Bitcoin blockchain when I worked at Keybase. If you're trying to do peer-to-peer security, and you want to prove not only that the evil server hasn't forged anything (which you do with signatures) but also that it hasn't deleted anything legitimate, "throw a hash in the blockchain" really is the Right Way to solve that problem.