Since the cost of maintaining a virtual currency is extremely small, there is no practical limit. Of course, some small number will dominate. For a parallel situation, look at home many Linux distros there are: http://en.wikipedia.org/wiki/Lis... That can occur because one person, with enough free time, can package there own distro. But a handful of all distros represent the majority of all Linux installations.
According to the figures in the infographic Bill Gates has given $28 Billion to various charities since 2007, which apparently accounts for almost 48% of his net-worth. One of his biggest charitable efforts has been towards the eradication of malaria and an end to polio.
The Bill and Melinda Gates Foundation has donated billions of dollars to causes all over the world, making significant differences in the lives of children and adults. This level of giving back illustrates Gatesâ character and focus on social responsibility as a global corporate citizen.