He’s got too much of a savior complex for that to work. His view would be that any good for himself is by definition good for everyone on net.
I’m reminded of that Sam Altman quote “Elon desperately wants the world to be saved. But only if he can be the one to save it."
I mean, there’s an infrastructure problem that’s worth considering. With low enough population density, it could become no longer feasible or worth it to maintain large-scale, country/globe spanning infrastructure projects such as power grids or undersea fiber optic networks. This infrastructure didn’t matter much a few thousand years ago, but it’s pretty critical now, so the same rules don’t necessarily apply.
I don’t know how likely I consider this outcome to actually be, as you’d need a very steep decline, but it’s at least worth keeping in mind.