Facebook CEO Mark Zuckerberg has much to be happy about with all of his company's success. With the growing popularity of Facebook Live and the debut of a food-delivery service, Zuckerberg's net worth has increased over $1.6 billion to $56.6 billion. According to Forbes, he's the fifth-wealthiest person in the world. Zuckerberg also jumped to fourth, from the seven spot, on The Forbes 400. The social media giant is expected to bring in about $7 billion in revenue.