Visa is a giant payment processor with a massive reach. There are reasons to like the stock, but there are real reasons to dislike it, too.Visa (V -0.48%) is a well-run company. It is understandable that many investors might want to own the stock. But even great companies aren't appropriate for every investor, and that's definitely true of Visa.Here's a look at why Visa stock is interesting today and why, despite its attractiveness as an investment, some investors might want to avoid it just the same.Visa i ...