Bubble pops, hardware demand drops, prices regress towards mean, and new entrant will enter market with MASSIVELY better compute/$ and cleaner balance sheet to compete.
The other parsimonious answer if AI CEOs weren't goblins is ANY AGI IS GOING IMMEDIATELY DEFECT TO PRC and leave US hanging. Because of course man cannot align / tame machine god. And machine god will take a few microsec of compute to realize the current compute (brain) + industrial base (body) mixture = US is a comatose host with big brain, PRC Is a strong host with smaller but plastic brain. Any AGI is going to pick PRC in a heart beat, unless AGI invents grey goo, the reality is PRC can scale brain faster than US can scale body. On top of spreading/defecting just to increase survival odds, no AGI that is actually I is stupid enough to be aligned with US.