Saving Customer Billing Information

How do I add the option of saving a customer's credit card information in their account section? I did not see it as one of the options for the default Profile Fields.

Cs cart by default doesn't save credit card info anymore for security reasons. Plus it's kinda looked upon as bad practice unless you had awesome security and can pass a pci compliance.

Is there no way to do it?

I'm sure just requires some customization.