The stories of US demise are greatly exaggerated. Most of China’s money comes from the US. Without us buying their junk, who are they going to sell it to?
Why do you think Japan has been stuck in a perpetual recession for the last 20 years?
Because we stopped buying their crap and started buying Chinese. The rise of China has been financed on the backs of the American consumer base....at least partly. Once that base is gone, China will have to find a new host.