When Facebook was a days-old dorm room project, Mark Zuckerberg was asked by a friend whether he thought he would make money. “Well I don’t know business stuff,” Zuckerberg responded. “I’m content to make something cool.” From that moment, Facebook’s market cap has increased by $964 per second. So the business stuff worked itself out. This is very rare, because nowadays, the business world is increasingly filled with something that makes Morgan Housel nervous: Great products with little to no sustainable business model backing them.