A decade ago, 28-year-old Ben Milne dropped out of the University of Northern Iowa to start his first company, Elemental Designs. In 2008, he moved on to Dwolla, an online payment system that allows you to eliminate credit cards completely.
"I started college because I thought that's where I was supposed to go," Milne told Business Insider. "I applied to one college, I got in, went, and realized it wasn't for me. I had customers, so I stopped going to class."
Four years after starting Dwolla, the company is moving more than $350 million.