This is of course anecdata, but I've personally used BTC to send remittances in Venezuela.

I'm not sure how many people here use BTC as a means of preserving the value of their money since most people would rather hold USD, but for sending remittances, it cannot be beat.

As another interesting anecdote, my sister is in Argentina and a bunch of friends started asking her how to buy BTC before the election yesterday. Seems that those that managed to move their Argentine pesos to BTC did so just in time: https://www.aljazeera.com/ajimpact/argentina-central-bank-cu...