> if you are one of the unbanked billions around the world.

I think I can buy that. The unbanked could become centrally-banked like all of us as their countries develop, but there is a competition between that and the cryptocurrency which could wedge itself in at this point and outcompete the local government simply because the government is small and lacks in experience (maybe corrupt too). Another contender here is WeChat and similar centralized payment technologies, but they too are hamstrung by their own current governments (I'm sure that Payapal is) giving breathing room to competition.

It is not obvious to me which one of the three will win among the unbanked.