1. Military build up since WWII, including global logistics and bases. For example, the F-15 is 104-0, and no one has come even close to the F-22 (arguably not even the US with the F-35)
2. The best infrastructure (and supporting services) in the world
3. Reserve currency (for now).
It's important not to forget these while on the China hype train.
One of the bigger downsides that the US has is that we are used to a higher standard of living compared to other countries. This was possible by the aftermath of WWII, where everyone else was destroyed. Not so much now, as global infrastructure/development is catching up and we are starting to revert to mean, which means down.
Our technology is accelerating exponentially, I wouldn't be surprised if manned fighters become obsolete in a decade.
Germany produced some of the most sophisticated weapons in a short span during their time because they were focused. While we are busy optimizing clicks and politicizing gender pronouns, China has shutdown all kinds of virtual industry.
And the ability to draw and assimilate global talent.