This guy’s done a nice job using his wallet as an EDC carry. He’s included a ferro rod, credit card knife tool, tool logic t1 wallet tool, tick key, first aid reminder card, pocket fresnel lens (also good for fire starting), various survival info, snare wire, credit card knife, assorted first aid kit (bandages and medications), and a CPR face shield.
That’s not a bad go at it. A few additions I would want to see include: a spare car key, duct tape (folded around a credit card), extra cash, a calling card, and an “ICE” card but it’s really up to you. Do remember, however, that you’re going to have to fit this in your pocket and it can get large fast!