Bloomberg has a recent article featuring short interviews with 10 of the wealthiest people in the world. Their surprisingly candid answers are worth a read. 

For example, Eli Broad believes fine art is a better investment than gold or treasuries. Also Donald Trump's worst investment was a yacht.

Read More:http://www.bloomberg.com/news/2011-11-30/billionaire-prokhorov-touts-gold-as-trump-embraces-foreclosures.html