When I think of a credit card, I think there's really three reasons that I might want to have a credit card. And one of them is probably the obvious one most people think of. And that's because it earns a lot of points or cash back on categories I spend in.

If you spend a lot of money on dining, having a card that rewards you for that dining. If you spend a lot of money on groceries, same thing. Or if you just spend a lot of money that doesn't fall into a specific category, having a card that rewards your everyday spending, whatever category that is, there are a lot of categories where there aren't cards for bonuses.

So that could be another one. So that's one reason to have a card.