The country you choose is a personal choice based on what you need, languages you speak, cost of living, immigration restrictions, gun ownership, etc.
Rank your priorities and check out the top 2-3 countries. Countries where many expats are going include Costa Rica, Panama, Paraguay, Ecuador, Uruguay, Chile, Brazil, Singapore, and the Philippines.
My family and I looked at others too. In the end, we became residents of one of the countries listed above but have retained U.S. citizenship, pay U.S. taxes etc.
The goal isn’t to abandon the U.S. but to have a viable escape when everything implodes.
I have heard Chile is very nice. Would NOT consider Singapore due to its justice system. The others look unacceptable too. sigh