I did stand-up comedy for 18 years. Ten of those years were spent learning, four years were spent refining, and four years were spent in wild success. I was seeking comic originality, and fame fell on me as a byproduct. The course was more plodding than heroic.

The banjo is truly an American instrument, and it captures something about our past.

I just believe that the interesting time in a career is pre-success, what shaped things, how did you get to this point.

I never thought about success. I always thought about doing the job at hand. My goal was getting through the show that night.

Helping the poor doesn't mean redistributing the wealth. It means removing the breaks that give the wealthy an advantage so huge that big chunks of the nation's income are automatically removed from individual economic competition.

Business executives need to start by spelling out and communicating their values. Then they need to lead by example. This means getting rid of the bad apples and declining opportunities that bring instant wealth at the cost of selling one's soul.

My most difficult class at Harvard Business School would have to be finance.

By lowering the barrier to create new digital currency applications, we'll see an explosion in the number of ideas tried. We'll invest in, partner with, or build a number of new applications in this space, including replacements for many of the services people use in finance 1.0.