Here's a scenario to consider:

1. Xi Jinping decides the time is right to invade Taiwan.
2. With many US forces concentrated in the Middle East, & cruise missiles & smart bombs in reduced supply, the US can’t respond effectively.
3. The invasion of Taiwan, successful or not, cuts off US access to advanced chips (90% made in Taiwan)
4. US tech stocks are wiped out, the US economy goes into freefall.
5. US becomes Russia 2.0: a failed state with a mad dictator, nukes & an economy in shreds.