This is one of those cases where the other side of the argument is, Is it better for the poor to have more or less options?
We really need to be careful about paternalistic urges to control what others have access to just because we think we can manage their lives better than they can.
The Bitcoin ATMs sound like they're using demographic data to place machines where people are more likely to derive value from using those machines. That is, on its face, a positive thing.