Bitcoin cannot help a poor country. I have the following reasons which I would like to site:

Low Internet access - If people cant access internet how will they even know about bitcoin let alone do transactions through it.
Low Security measures - totally insecure to them since they have very low knowledge
Low Fees for miners - This will hurt miners
Low usage - People in poor countries are "Poor" - they need more time to work hard and earn Fiat, since they are poor they would never accept bitcoin as primary source of money and would never believe that it is secure as well.