Given the gold rush going on in Silicon Valley right now, it's not surprising that some young entrepreneurs think it's time to drop out and start a company. Nor that billionaire VCs like Peter Thiel have started paying kids to skip school and build startups. 

Not surprising, but still stupid.

It's not just about money, though that's an easy reason to stay in school: Not graduating from college will cost you $500,000 over the course of your life. But the bigger reason for me comes down to experience—rather, the lack thereof—in unstudied entrepreneurs.