I used a card case for a while too and eventually stopped. Not really sure why. I carry more cash than I used to and remember having trouble keeping track of my cash when I had the card holder.I had gone the card case route for a white with cash separately, but after a few years I still didn't get used to it. Now I used an extra-large card case that has room for cash folded up inside. It's slightly more compact than a wallet meant to carry cash.