Well Cubans have been doing it for decades, and us Venezuelans started doing it recently

Fair enough, but is everyone able to do that? Some people still dont have means to leave. If they could, they probably would. Cuba the government prohibits It and It is an island, but Venezuela have borders with a lot of countries, and not everyone have the resource to leave.
Also, Cuba and are the opposit If the spectrum with rules and regulations working the bad way.

This doesn’t sound as a sustainable business model. Don’t you agree?

Not sustainable, but wouldnt matter to some of them If they make a big profit.

That’s why the migration is always towards countries with a lot of economic freedom,

Yes, and these countries have regulations that allow a more Fair market. The big ones win lots of times, but small ones is can Join the competition to take his share of the market.

Crypto can definetly help with reaching a fair market, but push towards less bad regulations, but no regulations at all kills the competition.