But I must say BTC will help you and third world countries with more strenght if you have an initial money to invest. Start from dust is very hard and not suggested as you will take a long time to make fortune with BTCs and another Crypto Currencies.
If you have the money, you buy the BTCs and hold it for a good time, when the price is high and you know it won't be stable, sell the coins and buy again when the price falls. That is how BTC can help you as extra income.
There are micro earnings too, very useful for third world countries, if you introduce your neighboors to it, you can make a good profit from them as referrals, if you are a good boy you can help them too sharing comissions, check Micro Earnings section.