You mean like a single world currency among other things? I can’t see it - look how hard implementing the Euro was and that was supposed to create a competitor to the USD. Yet you’ve got countries like Greece who went broke (because other fundamentals don’t change just because the currency does) and of course the UK who refused to adopt it and then went further with Brexit. Imagine getting the US, Chinese and Russians to agree on a single world currency
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Not saying it is possible but control wise I can see it happening 20-30 years down the track due to shitty world governments combined with technology and such.
With currency it's actually easy to manipulate countries to join the world dollar. Easiest way is to devalue a dollar so much so the country has no choice but to adapt it.
Yes the Euro isn't as going as they expected but my take on it is they can somehow strengthen the Euro, forcing England to adapt which would then in turn, for the US to adapt and so on.
I think if you get England and the US on board, every other smaller country will jump on ship.
Like you said, China and especially Russia would be the hardest mission.