I have little doubt that China can ruin us economically because they own all our debt, which our government is addicted to. But a USA with an economy in rubble would leave China with their own problems. They are far too dependent on the USA as a market, way more than we are on them (because they won't open their markets to us).
Besides, such an overt act would get retaliation. Economic at first, perhaps. Ultimately escalating to military. It would probably start WW3. They might make us broke but we could still feed ourselves and still launch our nukes, at least for a while before civil unrest of the gimmedat class started when the government checks stopped showing up.
Would China take that risk?
They don’t own all our debt. They are holding approx 1.6T of it. We could inflate that away in half a heartbeat.
Dirty little secret is China is in worse shape than us economically.
China owns about 7% of U.S. Treasury debt. That's the largest share owned by any foreign country, but it's hardly "all our debt."
While the stock market went down last night, at the same time the US bond market went up. Our debt is greedily purchased from people all over the world, not just China. And when I say people, I mean countries, banks and pension funds. The US ten year note is going up in price. The yield has dropped below 3%. Our country is not falling apart. Our debt is not currently a big deal.
If you are looking for cracks, consider the EU. And especially watch Italy. If the western world falls apart, it will start there. Before the central banks intervened, Italy’s debt was yielding over 7%. Now its about 3.2%. And it was only 1.7% in May. The EU only talked about not buying bonds and germany’s bonds went up to .24%. Italy’s bonds moved to 3.2%. So the yield could more than double, going back to 7%, if the EU’s central bank stopped buying their bonds. If the EU falls apart, there would be contagion. And that would cause trouble in the US. But until you see it there, its not coming here. They are the front line.
US Debt held by Foreign Sources is about 30% of overall debt. China holds ~ 25% of that which would be about 7 1/2% of the overall debt....article says 5.6% I’m sure it fluctuates.
https://www.marketwatch.com/story/heres-who-owns-a-record-2121-trillion-of-us-debt-2018-08-21
Article is a little over 3 months old.
[I have little doubt that China can ruin us economically because they own all our debt, which our government is addicted to.]
[But a USA with an economy in rubble would leave China with their own problems. They are far too dependent on the USA as a market, way more than we are on them (because they won’t open their markets to us).]