The 'Billionaire' song is what my kids tease me with. They sing it to me. It's funny.

We should all grow our own food and do our own waste processing, we really should.

This [philanthropy] work is even more fascinating. It requires us to think harder about how we build partnerships, who we get behind. And yet we get to see progress that in some ways is even more profound than the great advances that digital technology has provided.

Bitcoin is mostly about anonymous transactions, and I don't think over time that's a good way to go. I'm a huge believe in digital currency... but doing it on an anonymous basis I think that leads to some abuses, so I'm not involved in Bitcoin.

That it's a worldwide thing that families are better off.

If you're taking care of your family and society and are comfortable you can start to think about helping those most in need globally. That's how we became engaged in those things.

It's easier to add things on to a PC than it's ever been before. It's one click, and boom, it comes down.