Warren Buffett is considered one of the greatest investors of all time. So when he talks, Wall Street listens.One point he has consistently hammered home throughout his illustrious career is the importance of buying shares of companies, intending to hold on to them for a long time, preferably forever. Buffett has generally followed his own advice. His portfolio features some excellent buy-and-hold options.One of the best is Visa (V 0.45%). The financial services giant ticks many of the boxes Warren Buffett ...