When the leadership does something bad its one thing, when the arms dealer does something bad its a WHOLE OTHER can of worms. This has been true since ye olden times. This is just the modern equivalent. Jensen and his leather jacket is literally the biggest arms dealer in the digital space functionally speaking.
And when leadership was more lax and forgiving investors are going to not react as hard, but with a shift in leadership at a pivotal point where its highly unclear if that shift is going to matter or not. It means you as an investor need to hedge HARD and be really cautious.
All it would take is a reclassification, restriction or some other change that limits or pulls in nividia and the rest of the compute space to bankrupt a LOT of the investors right now because of how large things have gotten.
If the new leadership decides that Nvidia and their products and secrets are now also matters of not only national concern but national defense? Which considering how things are being treated in some respects is not a unreasonable consideration. The entire global market could shift fast and hard, leaving a lot of investors holding a bag.
Politicians just need to see the whole AI and digital war front as a thing that needs to addressed with more seriousness and decide that nvidia/amd is no longer allowed to deal with china at all and it would likely pop the bubble HARD.