The advantages are close to what you’ve stated. By having the world use the US dollar, the US is able to cut them off from trade from most of the world. The more the US does that, the more it’s tempting for other countries to find an alternative.

The downside is that you need a fairly stable currency that has some amount of ubiquity to replace it.

Peter Zeihan did a pretty good explanation of de-dollarization and BRICS

https://www.youtube.com/watch?v=xTwwNoh0E6Q&pp=ygUecGV0ZXIgemVpaGFuIGRlIGRvbGxhcml6YXRpb24g

Revolutionary Left (Rev Left) is a great educational podcast that covers a lot more than just theory and has some great interviews in it. As others have mentioned, Second Thought is also a good resource.

I assume you mean permanently given the server I’m seeing, but you should definitely travel and see if you’re happier somewhere else. We don’t know what the future holds, but sure, leave temporarily and see how you like other places