I think you over-estimate the longevity of US economic hegemony, if it even still exists. While it is true that it is home to some massive corporations, it is also true that they’ve made their money by outsourcing their work to places with little to no workers’ rights, and low rates of pay.
China is already realising that this relationship is not tenable. The pollutants that their industrial miracle has produced have led to situations where entire communities get the same type of cancer. What is corporate malfeasance on US soil is standard corporate practice in China. Apple’s big supplier Foxconn has fucking suicide nets installed on its high buildings, FFS.
With a growing middle class, China is already at the point where it needs to change its modus operandi.
At the same time, Trump’s trade war is causing input costs to rise for manufacturers in the US. He’s done the steel industry a world of good while causing others a world of pain.
I’ve said this since forever, but as someone that lives on a small island, I know that the US has everything it needs within its borders. As an observer of its international relations, I know it’s not tenable for the world for it to get everything it wants.