From Proof66.com:

"Wildcatters" were individuals who ventured into wild unknown and/or unproductive areas and sank wells drilling for oil. No geological surveys; no safety net. Just an idea and a drill.

Are you a wildcat? You've got an idea. You've got the know-how to execute the idea. You even have a bit of capital to give it a try. But do you have "it"? You can have the best idea and all the capabilities in the world but there's still something more that's separating you from what is on one hand a Wildcat and the other hand every other person who has an idea and a little money. Call it courage; call it foolhardiness; but whatever "it" is, the Wildcats have it and many of the rest of us probably don't.

The rest of the story can be read here.