Why do so many people preach diversification when some of the richest people in the world became so via a single investment?

Examples include the old RBs (Rockefeller, Carnegie) to modern entrepreneurs like Gates, Zuckerberg, Ma, etc. Even investors like Buffett and Slim can attribute majority of wealth gains from only a handful of opportunities.

So, do investors REALLY need to diversify? Or should they just watch their (few) basket of eggs very carefully?

I look forward to your mean-variance responses.

Submitted January 09, 2017 at 06:18PM by myother3somethrowawy http://ift.tt/2iciYnn