If you're not American or Chinese...

And America and China really do want to both be the lone superpower. (I'm just not convinced of this premise by the way, but let's assume it's true)...

Then the rational thing for you to do is look back on the past, what? 70 or so years and ask yourself has it been good for you or bad for you? That should give you a pretty good idea of which nation you'd be best off with as the super-power.

Then kick back, grab some popcorn, and hope that your guy wins.

I mean, if you're not American or Chinese...

it's easy.

I hope that my country (Hungary) will not be the battle ground for the 2 superpowers. It was for the last 1000 years.

In that case you don’t care who wins — just that win quickly ;)

the 'cold war' ended up being a bunch of proxy actual-wars in my area, and I don't think the thousands that died liked it very much.

Generally going to face a similar fate as Americans. With exception of a few sanctioned countries everyone can participate economically and legally in the US subject to the same laws.

Pick a side to bet on.