Earlier quoted context omitted.
Right, that's called regulatory arbitrage. It's not a [edit](unique) use case, it's basically crime, give or take. You're just skipping the AML and KYC checks that you'd ordinarily be required to take. Believe it or not sending money takes a few milliseconds in a classical system, except for, you know, regulatory and compliance checks that coiners pretend aren't actually needed. The use cases are: regulatory arbitrag…
I always tell people of how my mother was smuggling Soviet rubles stitched into her coat when she flew to NYC to immigrate to America and in the real world people are aghast at the unjust laws of the USSR while on the internet everyone is like "but the law". Fuck the law. Law != Justice. Use some critical thinking skills for once. You earned your wealth. It's not the government's.
Typically people were smuggling foreign currency (US dollars) out of the Soviet Union rather than rubles. Rubles were of little use in America. But smuggling dollars was in violation of two soviet laws at one -- any operation with foreign currency was illegal (up to death penalty for currency "speculation" at scale); and transporting undeclared valuables across the border was illegal too. People in 1978 were literally risking ending up in a Siberian labor camp while trying to board an Aeroflot plane to Vienna (transit hub for immigration from the soviet union during iron curtain).