To play devils advocate - I'm not convinced =) Wallets are used for more than just cash ... NZ law for example requires you to carry your drivers licence at a

To play devils advocate - I'm not convinced =) Wallets are used for more than just cash ... NZ law for example requires you to carry your drivers licence at all times. Most (but not all!) people keep it it their wallet - sure you can attach it to your key chain or put it in the glovebox, but then if you're driving a work/friends car, you need to make sure you also have your keys with you (or remembered to grab your licence) I keep receipts in there - normally for up to a few weeks until I sort them and keep the important ones. Without a wallet, these will just go in a random pocket and probably be lost (though maybe you could have electronic receipts...) I keep business cards in there (both mine and others). Sure, some of the time you may be able to send a contact to the other persons phone, but if you're meeting a client etc for the first time, fumbling around trying to get phones to sync is probably not a good look. (Assuming the person has a phone that's compatible with yours). This ignores all the other advantages of business cards such as being able to scrawl a message on the back before leaving it with a receptionist, or tucked into a door. I keep one time keys on a bit of paper tucked in there - both gmail and for financial accounts. These are bits of data I specifically never want to ever be found anywhere on my phone or online =) And if you are young, where else are you going to keep that emergency condom? =)