I typically have between $100 to no cash in my pocket, depending upon when I last visited the atm. I mostly use cash for coffee, as I can tip a little, and I feel badly making the owner pay a credit card fee on a cup of coffee. Sometimes I use cash for a tip at a restaurant.
That's about it. It's not uncommon that I see a person on the street that I would give cash to, but I have none to give.
I don't expect that I will keep cash in my pocket five years from now.