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.
NEW YORK (AP)  Americans gave nearly $300 billion to charitable causes last year, setting a record and besting the 2005 total that had been boosted by a surge in aid to victims of hurricanes Katrina, Rita and Wilma and the Asian tsunami.nvestment superstar Warren Buffett announced in June 2006 that he would give $30 billion over 20 years to the Bill and Melinda Gates Foundation. Of that total, $1.9 billion was given in 2006, which helped push the year's total higher.