If you are a professional and have confidence, then I would advocate lots of concentration.
Warren BuffettIn our view, though, investment students need only two well-taught courses-How to Value a Business, and How to Think about Market Prices. Your goal as an investor should simply be to purchase, at a rational price, a part interest in an easily-understandable business who's earnings are virtually certain to be materially higher five, ten and twenty years from now.
Warren BuffettI don't really think that, as a society, we [americans] want to confer blessings on generation after generation who contribute nothing to society, simply because somebody in the far distant past happened to amass a great sum of wealth.
Warren BuffettOur system works. Over time, people will live better and better. We have a system that unleashes human potential, and now China has a system that unleashes human potential. We will have interruptions. We overshoot and undershoot sometimes, but your kids and grandkids will live better than you. Over time, we move ahead at a pretty damn rapid rate.
Warren Buffett