Currently, 18% or so of the Chinese economy is exports. Most people assume its much more. Of that 18%,about 18% of THAT is sent to the USA. So that means of the chinese GDP, only about 4% is exports to the USA. If the US was completely closed to the outside world by MAGA fans of Trump. China would barely feel it. On the other hand, a huge percentage of US products use some chinese components- zippers, screws, nails, thread, ink, paper, fabric, paint, minerals, solvents- a gigantic amount of small percentages really add up. If the US was cut off from all chinese imports, employment would crash, the economy would tank, and things would cascade downward even faster than in 2008.
So I would totally agree- China will fare much better than the USA in the upcoming trade war.
But individual chinese will continue to buy condos in the USA, send their kids to our colleges, and buy businesses. Because for all its flaws, the US legal system is more protective of private property, the government is less capricious, and they tend not to execute corrupt businessmen and then bill the family for the bullet in the USA.
Even if the USA really takes a dive, it will just mean more foreigners will take advantage of the lower prices to buy houses in Miami and Malibu.
But I still am not buying any Savings Bonds myself right now. Even the thirty year only pays 3%. Obviously, real estate, in either Buenos Aires or Miami, is going to be a much better 30 year investment.