Too often a vast collection of possessions ends up possessing its owner. The asset I most value, aside from health, is interesting, diverse and long-standing friends. Warren Buffett, 2010. Mr. Buffett's net worth in 2010 is estimated to be $45 billion. Along with his friend Bill Gates, Mr. Buffett, known as the "Wizard of Omaha," is coaxing the rich to pledge half their fortunes to charity.