yes i can help the worlds unbanked. there are a lot of ways in which bitcoin can help the unbanked of the world. there are also ways through which you can control bitcoins through sms based phones. so you dont even need a smartphone to control your bitcoins. and its value will stabilize after it is properly adopted by the world..
I think there are services which offer controlling and managing bitcoins just through sms but it hasn't expanded much yet. A lot of countries are still not supported, however that could be overcome. Its not always necessary to have a smart phone to act smart, controlling btc with sms, no need of internet now. How awesome is that?
In theory this can be done, but we are still far away from this. But just a point that it can be done shows how awesome is Bitcoin and its true potential.
Can Bitcoin help unbanked? Of course it can. One day you will be able to send $10 wotth of Bitcoin to the farmer in Kenya and he will be using just a basic mobile phone with text messaging, nothing else.