I opened this thread, not realizing that I had already replied to it in the past, 3-1/2 years ago (Feb 2017). I was going to reply today that I don't use much cash anymore. My old post:

"I usually carry $60. I should probably carry more. Except, that same $60 has been sitting in my wallet for years. Guess I don't run into too many emergencies."

Ha! I still have that SAME $60 in my wallet today! I probably ought to use it, or at least swap it out with fresh bills, before it rots or something.