One nice thing about being a superpower is that we don't
have to do anything. We can choose to be isolationist. That seems like a seductive option in the short term because it costs us nothing. But historically that approach hasn't worked out well for us in the past. Will the average US citizen be better off if China takes over as the primary global power?
And stop being disingenuous by labelling the current US-led global security system as an "empire". Words mean things and I'm sure you're smart enough to know what a real empire looks like, so I can't imagine what you think you're accomplishing by trying to frame the debate that way.