Nah, this is not about Nvidia being a bubble. This is about people forgetting that software will keep eating the world and Nvidia is a hardware company no matter how many times people say it's a software company and talk about Cuda. Yes, CUDA is their moat, but they are not a software company. See my post on reddit from 10 months ago about this happening.
https://www.reddit.com/r/LocalLLaMA/comments/1c0je6h/comment...
"The biggest threat to NVIDIA is not AMD, Intel or Google's TPU. It's software. Sofware eats the world!"
"That's what software is going to do. A new architecture/algorithm that allows us current performance with 50% of the hardware, would change everything. What would that mean? If Nvidia had it in the books to sell N hardware, all of a sudden the demand won't exist since N compute can be realized with the new software and existing hardware. Hardware that might not have been attractive like AMD, Intel or even older hardware would become attractive. They would have to cut their price so much, the violent exodus from their stocks will be shocking. Lots of people are going to get rich via Nvidia, lots are going to get poor after the fact. It's not going to be because of hardware, but software."
A lot of people are saying that I'm wrong on other hardware like AMD or Intel, but this article by Stratechery agrees, all other hardware vendors are possibly relevant again. I didn't talk about Apple because I was focused on the server side, Apple has already won the consumer side and is so far ahead and waiting for the tech to catch up to it.
The biggest threat to Nvidia is still more software optimization.