I’ve talked in the past about streamlining your wallet.
One of the “down sides” of having a card case instead of a wallet is that there is really nowhere to carry your cash. So I suggest you buy a money clip. Not only do I suggest you buy a money clip, I suggest you go to a vintage store or antique shop in your area and find one there.
Old money clips are the kind of thing that you want to pass down to your kids and wish you would have received from your dad or grandpa. Actually, before you go buy one, you should ask your dad if he or his dad have an old one you can have. Then you don’t have to make up a story about where you got it.