How is this a "best scenario" for the next 10 years? What other trading partner can take our place with China?
The tone of your post suggests that you believe the US will falter on the world stage. You've underestimated the cleverness of the American people. We'll survive and prevail while our Chinese "friends" will stumble sooner or later. It's the nature of their centralized system. They aren't good at democracy. They are good at bullying their people and anyone else who dares to criticize them.
The crocodile tears they shed over their embassy and their suicidal military pilots make good daytime soap operas but have little effect on world opinion.