65,535 - that is the limit of unique TCP/IP ports that's currently allowed on most systems (since port number is a 16-bit integer value) If multiple currencies overlap in port numbers, or if future coins use some other mechanism to connect to their peer networks you could always have more, .
In 2007, its founders were ranked as the second most generous philanthropists in America, and Warren Buffett the first. As of May 16, 2013, Bill Gates had donated US$28 billion to the foundation.
2015: Bill Gates World's No.1: Even after giving away more than $28 Billion in charity till now, net worth is at $79.3 billion just ahead of Mexican Carlos Slim. Microsoft stock price has helped to move back to the top position.