I found a short discussion[2] you may find useful.
[2]: https://www.lesswrong.com/posts/qhpB9NjcCHjdNDsMG/new-fast-t...
Only if we can increase the efficiency of LLMs by 2-3 orders of magnitude, there are only some in lab examples of this and nothing really being publicly shown.
Even then the models are still going to require rather large amounts of memory, and any performance increases that could boost model efficiency would very likely increase performance on GPU hardware to the point we could get continuous learning models from multimodal input like video data and other sensors.
While people may say something is a Transformer that's more of a general description. It's not a specific algorithm; there are countless transformers and people are making progress on finding new ones.
Bitcoin runs a specific algorithm that never changes. That's for an ASIC. AI/ML runs a large class of models. GPUs are already finely tuned for his case.
I'm reminded of Bitcoin/crpyto, which in its early history was all operated on GPUs. And, then, almost overnight, the whole thing was run on ASICs.
Is there an intrinsic reason something similar couldn't happen with LLMs? If so, the idea of a bubble seems even more concerning.