You're a responsible credit card user. You live within your means and pay your balances in full each month.
It's likely you even have several credit cards in your wallet, although the majority of your monthly expenses are charged to the one that helps you bank the most rewards. As for the other cards, you keep them active to help boost your credit score and serve as backup in case of emergency.
What's wrong with that? Well, in the past you had little to worry about. But times have changed.