Technology

China has an industrial base that can no longer be competed with. This is the winning recipe, so they will likely control the world.

I fundamentally agree. I don't think it will be direct control, but I think China will have a lot more political power in the coming decades.

So how well all of humanity fares, depends on how the leadership in China decides to treat u

Seeing how China has no recent history of violence and hasn't participated in wars for the past 40ish years, I'd say it's much better than the warmongering USA empire self-declaring itself "the world police". We've seen how well that worked for Iraq, Palestine, Afghanistan, Libya, Vietnam, Korea, Laos, Cambodia...

If we end up with say, a chinese Trump, we are done for

Thankfully China has a communist party in government, and no fascist parties like the Republicans or the slightly less fascist Democrats.

We should invest everything we can into ensuring the later

Surely the warmongering and genocidal western countries, responsible for the almost total extermination of native Americans, the enslavement of Africa and Asia, and invaders during WW2 (biggest armed conflict in history) aren't the ones most indicated to make decisions in this regard.