Mark Cuban believes you're capable of greatness ... It wasn't until after he'd finished school and started working for Mellon Bank in Pittsburgh that Cuban discovered his interest in technology ...

With a net worth of $5.7 billion, entrepreneur and investor, Mark ... to-day, Cuban still does a lot of things he was doing when he was a novice small business owner with a paltry bank balance.

He helped the bank join the just-starting digital revolution. "Back then a lot of smaller regional banks still did everything on paper," Cuban told Forbes. "Mellon had a department that went in ...