It's better for such poor people earning very little amount of money and only have $1 as their disposal income not to use bitcoin for payment method but use bitcoin as long-term investment.
Poor people can barely afford bitcoin so I doubt they will easily spend it over about anything. I also do not think they will be making transactions that are huge because again... they are poor. They will not be buying anything expensive. If they want to have bitcoin, they can build their holdings over time but if they still have very few I do not think they would want to use it for a transaction.