I think one of the main reasons that these 3rd world countries are investing so heavily into BTC is because of their value in currency. Bitcoin's value surpasses the currency value of their own country and with a weak government, they turn to BTC.
This of course is only my thought, and you may think I'm spilling bullshit. But almost everyone that invests in BTC right is in hopes that it will generate a 100x return and make them rich in the near future.
Lol! what are you babbling about? Bitcoin is already worth 11000 dollars! It has kicked the dollar in its ass already. So how come it won't be worth more than their local currency? Also *weak Government has nothing to do with it.
As for your second part, i disagree. People are not investing in bitcoin because it will make them rich, instead they are investing in bitcoin because it is the currency of future.
Actually in third world countries there is no job even they dont have such a good food and clean drinking water so in this kind of situation a lot of people they are going abroad to find a new life and bitcoin is the only currency which bring hope for them because bitcoin is providing such a good opportunity for people to secure their life and there is no doubt that a lot of people have changed their life with the help of bitcoin.