Sued by Capital One

How can a credit card company like Capital One charge off bad debt and then wait years later and turn around and sue me for it? I have never heard of a credit card company suing for credit card debt before, especially in Texas. Is this something new that they are starting? Is it something to really worry about? I couldn't afford to pay the debt obviously and if I could now I would have but I can't. I can barely afford the gas for my car or my mortgage payment, etc. With all of this uncertainty in our world today creditors like Capital One feel it necessary now to add this extra stress and pressure by suing America for money we obviously don't have. With actions like these it's no wonder we will more than likely be in a depression soon.