Most investors dream of buying one stock that provides them with life-changing returns. A few stocks have set their investors up for life. For example, a $1,000 investment in Warren Buffett's Berkshire Hathaway (BRK.A 0.82$2.7 million today. That's life-changing money for most people. A key to Buffett's success in turning Berkshire into a wealth-creating machine has been investing in wonderful companies at fair prices. One stock Buffett and his team ...