I think it cant since bitcoin have requirement with big amount of capital poor people in poor countries can not afford that requirements they need to buy foods and clothes to survive them.
You can work for bitcoin, you don't need capital to start, just like what we are doing right now... Just because they are poor they can't hold bitcoin, it's not like that, as long as they have knowledge about it, they could manage to have a bitcoin... Some native don't even wear clothes, and eat what they caught in the forest, but some of them are educated and even wealthier than others... What I mean is,anyone can have a bitcoin, as long as they have knowledge about it...

Poor in my definition is something that is uneducated and not so active in the internet, there main concern is to survive and have their basic needs. I guess, only few of the poor people you mention can work with bitcoin, not all has the right knowledge as I believe when working here education is a must.
Besides, working online is not the real essence on why bitcoin is created, it's just part of the benefits but it will not last forever.