How much liquid wealth does Mark actually have? Isn't the vast majority of it purely theoretical based on Facebook equity purchases?
"Mr. Zuckerberg, who founded Facebook in his Harvard University dorm before dropping out of college and working on the business full time in California, is one of the world's youngest billionaires, worth an estimated $6.9 billion, according to Forbes. Yet since his wealth is from his ownership stake a company that has yet to list on the stock market, much of that wealth is theoretical at this point."