I think Bitcoin can not help the poor countries because poor countries do not have the facilities available to them, they can not even trade bitcoin because they do not have a good internet penetration rate.
Well this is the main reason why I am saying that bitcoin can't help the poor countries, unless they are going to invest with computers and other facilities needed for their people to work for bitcoin. But I am very doubtful that if we are going to place these computers in the depressed areas in Africa, people there must be trained first on how to use computers.
You don't need a computer. All you need is a cellphone and a service plan. Most of the internet connection in the better countries of africa are from cellphones. Only some are desktops and laptops. It is perfectly possible for poor countries to benefit greatly from bitcoin. They can work online from anywhere in the world doing whatever they want and getting paid in bitcoin in minutes.