Warren Buffett

The basic ideas of investing are to look at stocks as business, use the market's fluctuations to your advantage, and seek a margin of safety

on non productivity of gold
"It gets dug out of the ground in Africa, or someplace. Then we melt it down, dig another hole, bury it again and pay people to stand around guarding it. It has no utility. Anyone watching from Mars would be scratching their head."
inheritance tax
choosing the 2020 Olympic team by picking the eldest sons of the gold-medal winners in the 2000 Olympics

I don't have a problem with guilt about money. The way I see it is that my money represents an enormous number of claim checks on society. It's like I have these little pieces of paper that I can turn into consumption. If I wanted to, I could hire 10,000 people to do nothing but paint my picture every day for the rest of my life. And the GNP would go up. But the utility of the product would be zilch, and I would be keeping those 10,000 people from doing AIDS research, or teaching, or nursing. I don't do that though. I don't use very many of those claim checks. There's nothing material I want very much. And I'm going to give virtually all of those claim checks to charity when my wife and I die.