Researchers have found that identical twins who have been separated for long periods of time actually invest in a similar manner. Biology really does affect how we spend money.

After Hurricane Katrina, I wanted to go back to New Orleans to help musicians return to the city. But Andrew Young advised me, "If you want to help people, go work at an investment bank." His contrarian advice opened my eyes to the importance of capital. "Learn how to make some money before you give it away." I learned that you can bring about good in the world especially if you have a paycheck.

Gone is the day where you work at a job for thirty years and retire. Millennials jump around and switch careers. I think it's important for CEOs to highlight career mobility within a company, so that employees don't get bored and continue to be stimulated.

Just the idea of making money can increase your skin conductancy, meaning there's a current of excitement.

For the last several decades, there was a prevailing belief among traditional economists that the markets were rational and self-correcting. Alan Greenspan advocated this view. But the 2008 financial crisis showed that this view is incorrect, and Greenspan eventually admitted as much.

It is important to understand that the most important currency is social debt. Doing things for others. In order to get, you have to give.

Money is becoming increasingly plastic and digital. If there is a major disaster, let's say an asteroid strike, we'll go back to trading meats and furs. We won't need an abstraction, a dollar bill, but real tangible goods to survive.