In the West there are generally two big queues for immigration:

• People who desperately need help, so refugees.
• People who bring things we really need, typically skills (though many countries will also to it for mere wealth)

Americans don’t (yet) qualify for the first queue and as for the second one it really depends on your skillset and wealth (if I remember it correctly Canada does have a VISA for people who bring enough money). Mind you, the skillset required to qualify for queue #2 is often not what one would expect - I vaguelly remembers something like “plumbers” and “pastry chefs”. It’s well worth it to check what are in-demand skills of the country you want to immigrate to if you need a VISA.