<prompt> Human: I got student credit card 5 years ago and just applied for Venture One credit card. I know I shouldnt cancel my oldest credit card but what should I do with it?  <response>: Put it in a sock drawer and use it to buy gum every couple of months. You may also want to talk to to credit card issuer and find out if they can upgrade it to another credit card that they have. Something with a higher available limit and better rewards. Good Luck! 