Not only rich people chooses USA, poor people will travel months or years to reach USA because the oportunity you find there ,you will never find it nowhere. Most illegal immigrants i know in usa , after a few months in usa they already driving a good Car, it will never possible for them to do it in their own countries.
Here my case:
I was managed a small exchange in latin america, had around 500K users , we sold around $1.5M worth of bitcoin per year.
2019 : i set up an llc in miami, opened two accounts on localbitcoin and paxful . During the first week i sold $2.8M with 7% of commisions. So you think i will be back to latin america. No never
other cases :
I know chilean guy, he owned 5 gas station in the caribean in 2022. In 2023 he decided to do the same business in usa and now he own 39 gas stations with properties and 12 Car delearships.
When you set up your business in the USA you will benefit from a large and wealthy market and everyone outside the USA will want to do business with you.