The fact that everyone is racing to get their own chatbots and many AI startups less than a year old are valued at billions is how you know it's a bubble. An investor once told me that the way he knew that a correction was inevitable was when there was a period where all stocks were increasing in value and it looked almost impossible to lose money on an investment. It happened with dotcom, it happened with crypto currency, it happened with small launch, it will happen with AI.
It's still early in the AI bubble but many of these startups will fail. Which one's will be the next Google and which will be Pets.com is anyone's guess. Nvidia is riding the wave to record profits and will likely survive when the bubble bursts but will see a huge drop in their stock and profits like Cisco and Sun during the dotcom bubble.
You'll see a lot of consolidation im sure, and there will be some that crash and burn, but I think you're over-estimating how much of the AI investment money out there is riding on the success of ChatGPT clones, or how much of a demand there is for it that isn't immediately apparent. Every major enterprise software company out there is trying to figure out how to implement it. You'll have some of the really big ones try to do it themselves, and have others partner with your OpenAI/Anthropics of the world. There will be endless niches and different companies that specialize in different types of implementation for every possible business case you can think of, and even more that you haven't.
In any case, Nvidia is in a good spot regardless of what happens. In terms of a dot-com bubble anlogy, they're more like an internet ISP in that scenario. Regardless of what the AI landscape looks like 5 years from now, you can guarantee that the demand for AI accelerators is going to keep climbing. Just look stuff that we already know is in the pipeline, like Sora, stuff like that is going to cause demand for hardware to explode, even from where it is right now, and Nvidia has such a lead on everyone on top of the fact that they almost never misfire, that I just don't see how they're not going to be printing cash as long as there's someone to fab their GPU's.
Also, as far as a bitcoin comparison, we're at the stage where Bitcoin hit 30 dollars and everyone started buying up AMD GPU's.