Is Capital One Financial a Millionaire Maker?

This credit card issuer takes on big risks with the hope of generating big rewards.Capital One Financial's (COF 0.27%) stock price is up over 2,600% since it came public in late 1994. Given that level of performance, it's fair to say that this financial company's stock has the potential to be a key element in a millionaire-making portfolio over the long term.But investors interested in Capital One need to understand that the big rewards here also come with big risks.Capital One Financial isn't your ordinary ...