The same was said of Hitler and Mussolini. They seemed undefeatable and successful, but generally, not always, evil fails.

China does not have a bigger economy than the US. The IMF pegs the US GDP at 20,5 trillion and China well behind at 13.4 ( worldpopulationreview.c…) . Further with China having over four times the population of the US the per capita GDP, what one CHinese produce is about 1/8 of the US, and close to that for the other OECD countries.

I cant predict the future and certainly China's growth rate has been much higher than the West but the big unknown is the effects of CHina's one child policy where Chinas population will be in sharp decline starting in another 5 years and they will be burdened with an aging population.

Repeat, each American is now producing about 8 times as much as in China. That they rose rapidly is largely about how poor they were to begin with and that they embraced free markets which unleashed that. But autocracies have a lot of problems and the Draconian one child policy is just one example where they will be weak.