So I know some older people who always carry a lot of cash on them, like $700 on them at all times. Shops want you to pay with your card, unless they are a small business not declaring the sale, so I guess it is handy carrying that much cash if you need to pay a friend for something on the spot. Or maybe it just reminds them of the olden days to carry cash.
Anyway I carry no cash on me, unless I'm on my way to buy some Devil's lettuce or some pingas. How much cash do you carry?
<$50 and even then it can stay in my wallet for a year without being needed.