Are you insane? China can only achieve that by forcibly conquering Taiwan, with minimum hundreds of thousands of casualties.

China can't win a peaceful competition against the US in the long run, because China is undergoing total demographic collapse (Marriage/birth rates declining 10% yoy every year).

China's plan is to sprint for the last stretch, while its population can still work.

As for the US, it is really held together by the massive wealth from its tech and financial dominance. Given the enormous social fractures today (please don't forget that Trump was nearly assassinated 1 month ago), an structural economic collapse will mean civil war.