LLMs deliver value. Right here today, to countless people across countless jobs. Sure, some of that is marketing, but that's not LLM's fault - marketing is what it always has been, it's just people waking up from their Stockholm syndrome. You've always been screwed over by marketers, and Internet has already been destroyed by adtech. Adding AI into the mix doesn't change anything, except maybe that some of the jobs in this space will go away, which for once I say - good riddance. There are more honest forms of gainful employment.
LLMs, for all their costs, don't burn energy superlinearly. More important, for LLMs, just like for fiat money, and about everything else other than crypto, burning electricity is a cost, upkeep, that is being aggressively minimized. More efficient LLMs benefit everyone involved. More efficient crypto just stops working, because inefficient waste is fundamental to cryptos' mathematical guarantees.
Anyway, comparing crypto and LLMs is dumb. The only connection is that they both eat GPUs and their novelty periods were close together in time. But they're fundamentally different, and the hypes surrounding them are fundamentally different too. I'd say that "AI hype" is more like the dot-com bubble: sure, lots of grifters lost their money, but who cares. Technology was good; the bubble cleared out nonsense and grift around it.