Air BnB, the popular online home-sharing site, has a valuation of $25 billion. Things weren’t always easy, and for its founders, it almost never happened. That was until they became “cereal entrepreneurs.”

Air BnB, the popular online home-sharing site, has a valuation of $25 billion. Things weren’t always easy, and for its founders, it almost never happened. That was until they became “cereal entrepreneurs.”