http://www.forbes.com/sites/steveforbes/2015/04/02/how-bitcoin-will-end-world-poverty/
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Bitcoin can certainly ease the difficulity of finding people to provide micro-lending and micro banking on a large scale.
It allows individuals to control their assets and have their own bank accounts without fees for the most part except when using it, the only downside is the requirement of some form of technology to use it but that can be addressed with a cellphone so its not entirely hopeless for the ultra poor to get a cheap phone wallet to use.
At the very least its a powerful disruption.