Capital One is heavily focused on credit cards, which has been a good business overall. But the drawdowns can be hard to take.Capital One Financial (COF 0.89%) is not your typical bank. When deciding whether or not to buy it, this is probably the most important thing to keep in mind. But what exactly is Capital One Financial? It's a mixture of a credit card issuer and a car loan maker. These both tend to be higher-risk areas of the banking industry. Here's a deeper look at the issues that you'll face if you ...