Bill Gates will donate 99% of his wealth to the poor in Africa, saying:

People will say many things about me after my death, but I am determined that "I died rich" will not be one of them. Doing good is a beautiful thing, and 1% of my wealth is enough for me.

It is worth noting that 1% of his wealth would also make him a billionaire, and even one of the 1,500 richest people in the world.