Many foreign banks will take American customers even if many others won’t - both policies are common in Germany for example, and in Canada accepting Americans i

Many foreign banks will take American customers even if many others won’t - both policies are common in Germany for example, and in Canada accepting Americans is routine. Plus, even most foreign banks that won’t accept American customers still routinely transfer money to and from the US, just as most US banks routinely transfer money to and from other countries. Nothing like capital controls.