It is so common for self-employed people to have ADHD, the disorder could be renamed “the entrepreneur’s trait”...The list of red flags was long for serial entrepreneur Ryan McRae­—doesn’t pay attention in class, bored easily, works on too many projects at once. But it wasn’t until he was on the brink of adulthood when he first learned he had attention-deficit/hyperactivity disorder (ADHD). Calling himself The ADHD Nerd, McRae has never viewed his diagnosis as a limitation. In fact, he’s used the disorder to his advantage.