Bloomberg Billionaire Index: 3 lessons learnt from trends in 2012

From the link: http://ca.finance.yahoo.com/blogs/daily-ticker/bloomberg-billionaires-index-biggest-winners-losers-140914563.html

3 lessons that can be learnt by watching trends of billionaires in 2012:

1. ONE COMPANY (Not portfolio): "Billionaires do not become billionaires by getting into a diversified mutual fund or investing in an ETF or investing in the S&P Index Fund -- You get rich by building equity in a very concentrated position that is typically one big company."
2. RETAIL: Most billionaires are also in the retail or commodity industries. Retail is a huge presence. 26 billionaires on the list started their careers in retail.
3. TECHNOLOGY & FAMILY BUSINESS: Twenty-two billionaires on the list have made their fortunes in technology, and 14 are a part of a family business.