Re crypto use in Venezuela - the classic case in such circumstances is "bad money drives out good", meaning that people would be more likely to dump something they perceive to be losing value rapidly (Bolivars) and to hodl something they perceive to retain value (Dash, for example). So, while merchants might accept Dash, most people would rather hang on to it than give it to a merchant if it is a useful store of value. It's usually the junk money that is in mass circulation, not the "good stuff". It's early days yet - see what happens once merchants stop accepting Bolivars.