It is considered unfashionable to have wallets bulge out of the front of your jeans, and it is uncomfortable to have them in your back pocket. If you put the wallet in your coat or bag, you may forget it at home. All of this has lead to people being frustrated that they can't find a good solution, but we all know the solution is to just get rid of the wallet altogether and replace it with a fingerprint decrypted digital wallet + id on a smartphone.