I don't know anything but it's not hard to see how this might work somewhere like Venezuela. Cryptocurrency seems most useful for black marketers to get funds out of the country, which will create a demand for it. If ordinary people get cryptocurrency from relatives, they can trade locally to get local currency, then use it to buy black market goods. The local money recirculates and the cryptocurrency funds sanctions-evading imports.

Whether this is a good thing or not probably depends on what you think of illegal markets in desperate situations.