Change is good but it often comes at a great cost. For third world countries, I think one of the major challenge they have with cryptocurrencies isn't just about the cryptos themselves but also look towards the developed countries and wonder why, in all there wisdom are yet to accept bitcoin along with other altcoins for a means of exchange.
The problem of third world countries is old, uncreative leaders with rigid mentality and ideologies that are uneasy to change and advance. Nigeria is a good example of a country where everything is supposed to be good based on human and mineral resources but unfortunately what we see is something short because of incapable and corrupt leaders that rather loot public funds than think and research on new innovations that could lead the country forward. Good thing change is also constant as well, so we still keeping our fingers crossed for the future.