One with a kinder wording:
While yes, it would be very weird for one to carry their wallet around in their attachè, it could also serve as a nice alternative to keeping the wallet in your pants pocket. I enjoy the warn look that develops in the back pockets of my jeans. I would never want to make the fashion statement of having one on my pants pocket, however. Some people could use their attachè, while others may prefer their jacket pocket, or possibly the front pocket of their pants. Either one display a keen eye for the small details that I can support.