They don't have to use Bitcoin too often but only use Bitcoin for their saving. They shifted their money into Bitcoin instead of fiat savings especially for those who know Bitcoin potential in the future. They will search for how they can maximize their potential to earn more money to buy Bitcoin and not use Bitcoin in the daily expenses.

They can use local exchanges to buy Bitcoin and only send their Bitcoin when the amount is enough to cover the fees. Or they can hodl their Bitcoin for some time, they will determine that. The important thing, no matter if they come from third world or develop countries, they need to learn how to adapt with their current situation. We don't know how they live in their country so we can only suggest what we know.