If you are hunting for investment gems, Warren Buffett's Berkshire Hathaway (NYSE: BRK.B)(NYSE: BRK.A) is an excellent place to start. The legendary investor has built a powerhouse portfolio over decades, stacking up some of the best-performing stocks in history. One of his latest buys, Domino’s Pizza (NASDAQ: DPZ), is proving to be a rewarding pick, not just in terms of share price appreciation but...