At the end of the day, what nvidia does is just producing IP. All manufacture is by other companies.
This means that nvidia capital is spend on testing/development infrastructure and creative labor.
So, you don’t need monopoly breaking to handle nvidia if it keeps growing, but instead rethink IP laws.
Testing infrastructure is less capital investment than production manufacture. (See ASML and TSMC beeing booked), and humans can be persuaded to work elsewhere.
This means Nvidia cannot fall a sleep, even if they keep snowballing. In a few years a rival can always arrive, or current ones snag key people or have dev/test infra breakthrough, or IP law could change as its critics rise every year.
Sure, if Nvidia keeps its good game it will keep on growing and get even bigger share, but if it doesn’t, it will happen what happened with intel, intel got greedy on its position, and the company got fat.
As long as nvidia keeps its game, it’ll be good for customers even if they swallow more market share, as prices are always limited by the value business customers get from AI, and the investment needed for a competitor is not even close to infrastructure or resource extraction stuff like high end chip fabs, oil extraction, energy grids, telecom grids.
Again, Nvidia does not produce any physical goods, only designs.