Yes there is. I’ve heard it in quite a few podcasts and articles. They get you when switching citizenship, but maybe you can keep it if you can stay a dual citizen 

BitcoinIsTheFuture

I believe there is an exit tax when expatriating from the US. As best I can tell it is calculated on a “deemed sale” of a person's assets on the day before their expatriation. I'm not very informed on this topic. Just saying that throughout your life you're opting-in and opting-out of various systems (sometimes actively, sometimes passively) . There may be a tax/cost to opting out, but if it's tied to the moment of opting out that seems like a roughly reasonable way to organize society.

bitcoin

Tools for Saving

> And unlike real estate, the taxation must be considered a “fair deal” by the owner who pays the tax since the property is not tied to any particular location and the holder has the option to exit and pay tax elsewhere where they consider the tax just.

This is an underrepresented and maybe even underexploited point. Doesn't the US have an exit tax though?