Warren Buffett, the most celebrated investor in the world, has grown his investments unlike anyone else over the course of more than 70 years beginning with the first stock purchase at the very young age of 11. Warren Buffett, the greatest investment wizard of the century, world's third-richest person (Net Worth: $86 billion | s ource: Bloomberg Billionaire Index ), utterly successful business magnate, philanthropist and the Chairman & CEO of Berkshire Hathaway, doesn't fail to address the shareholders at Berkshire Hathaway's Annual General Meetings even at the age of 87. Warren Buffett's investment styles, techniques and principles have been widely admired by a large number of people around the world.