Already incredibly wealthy (if you think inequality is bad in the US, you should see Shanghai or other parts of China) and had no intentions of staying in the US and were just here for education. It was extremely common to see Chinese students driving around in BMWs, Mercedes, Audis, and very often nicer cars, and it became something of a stereotype with most of the people I knew. Not to mention my university was taxpayer funded.
Assuming it was a US university, the Chinese students were paying a special extra-high tuition for international students.
https://www.bloomberg.com/news/articles/2019-04-30/millionai...
I'm pretty sure some huge companies have important advantages by portraying that the expensive one of the US is better. But I highly doubt it.
And for the really rare cases for rich person's, people fly where the best specialist is.
? If you're rich in the US, you stay rich as long as you keep your money.
In China, your RMB is worth what the Party says it's worth, and you can be arbitrarily destroyed for political reasons.
Excepting issues like 'cheap labour' - on most other secular issues, America is a better place to be rich, once you're rich. (ie notwithstanding non culturally secular issues like the fact most people generally prefer their home country for obvious reasons)
The RMB is a fictitious currency because a) the central bank is politically controlled b) there are currency controls c) lending is driven by the state and d) it's opaque.
The Chinese government has magical monetary policy powers, they can do anything.
The US has a fair bit of transparency, no political control and no capital controls. That adds up to a fairly 'fair market value' for USD. They can get away with shenanigans, but not remotely like China.
The Euro is the strongest of the big currencies, mostly by virtue of the fact many countries share a currency, and they are all afraid the other would print money and play games ... so in effect you get super strict rules.
Euros are backed by assets according to rules. There's some sneakyness, but it's all papered over with rules.
The USD is backed by the US gov, and since 2007 a lot of real estate. Also, because it's a seigneurage currency, it's kind of backed by the fact everyone around the world uses it.
The RMB is just whatever the party wants it to be worth.
China wants everyone to respect the RMB, they want to make more international transactions etc. but for that the rest of the world needs to see it's reliable. But in order for that, China has to play by a set of rules and not play harry potter with money. But they want to keep the magic wand (it's rational for them to want that power), so they will have a hard time making RMB go much further than their immediate periphery. Nobody wants to hold RMB.
Mobility problems are mostly for Americans, not for ex-pats.
Geopolitics is a little important, but for most people, it's about their job, their opportunity.
It's troublesome because 99% of US companies and Chinese ex-pats just want to do work and are getting caught up in geopolitics.
But to be fair: this is a real problem. Espionage, influence, interference is a thing. Here in Canada, the Chinese gov. is directly influential in student activities etc. - at Ryerson in Toronto, a young Tibetan woman was elected head of the student union and it met with fierce and organized resistance from Chinese students, supported by tentacles of the state. As a small example.
That said it'd be nice if there were better ways past this problem, because it's not a problem for most of us!