I have a more realistic idea: Zuckerberg is a thief and a resentful little twerp with an inferiority complex, so much so, he even named his dumb project along the lines of the Winkelvii's crypto currency exchange. He needs cryptocurrency like he needs a biological warfare program to achieve the goals of his business, but his well founded sense of inferiority to the Winkelvoss entity he owes his good fortune to causes him to attempt to actually beat them at something.

But hey, I could be wrong. Maybe he's doing it because he's an idealist and wants to help the Africans.