The American banking system is very dynamic and open for foreigners. You can live outside the USA and have a bank account in the country, without any problem. As long as you declare the origin of all the money you send and collect the proper taxes, the operation is perfectly legal.
Some of the advantages are
- Financial reserves in dollars, an extremely strong currency.
- Possibility to have debit/credit cards in the USA, avoiding taxes on card use while traveling,
- Possibility of making international purchases online.
- Ease of making investments in the United States.
Open your account online
Many banks require you to be physically present, but others make it easy to open the account online. You will have to submit your identification documents, fill out some forms, and make an initial deposit that varies from bank to bank.
Do some research and find the option that works best for you.