I do think Bitcoin is the first [encrypted money] that has the potential to do something like change the world.

In a world where wealth is growing, you can get away with printing money. Doubling the debt over the next 20 years is not a problem.

I do think Tim Cook is doing a very good job, I think he has almost impossibly big shoes to fill with Steve Jobs' departure. And so, that's the context always someone has to put things in. But, I do think that for the most part that Apple is at a point where it's much more focused on scale than on doing new things.

Anti-aging is an extremely under-explored field.

Every business is successful exactly to the extent that it does something others cannot.

In the '30s, the Keynesian stuff worked at least in the sense that you could print money without inflation because there was all this productivity growth happening. That's not going to work today.

Under perfect competition, in the long run no company makes an economic profit.