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 north office building of the newly opened $500m Bill and Melinda Gates Foundation campus in  Seattle, Washington, US. The Gates Foundation supports work in more than 100 countries in areas of health, development, and education. Photograph: Marcus Donner /Reuters The story of the worldâs largest private foundation begins with a couple reading a news article about suffering in the developing world.