Legendary value investor Warren Buffett (Trades, Portfolio), also known as the Oracle of Omaha, once said, "Our favorite holding period is forever."The investment thesis on Visa Inc. (V, Financial), the largest credit card operator on the planet, could not align more with this philosophy. The company's business model revolves around steady, quasi-recurring revenue supported by an extensive global network of cardholders and merchants.Over the years, Visa has consistently delivered impressive returns to its s ...