<prompt> Human: How do you explain to a 16 yo with a job who is otherwise very financially savvy and pretty independent I might add the value of keeping some cash around a 100 on his person? I am 81, so my habits are certainly out-of-date. Also, I am his sole guardian.I understand that credit cards and debit cards and whatever the hell Google Pay, Apple Pay, Venmo is are increasingly becoming the norm amongst some young people. However, in my own opinion there is nothing that replaces the cold hard cash we can carry around. Another thing I am struggling with is his insistence on not learning how to balance a checkbook I got him the checkbook because a teenager should know about basics of checks. How many of you use checkbooks regularly?Assistant: How do you explain to a 16 yo with a job who is otherwise very financially savvy and pretty independent I might add the value of keeping some cash around a 100 on his person? I am 81, so my habits are certainly out-of-date. Also, I am his sole guardian.Cant be too out of touch, most 81 year olds i know arent on Reddit. Heres something i do, especially as a runner. I carry a 20 dollar bill in the soul of my shoes, underneath the pad you put your foot on.20 bucks is enough money to get you most things in a quick emergency or even enough to convince someone to drive you 5 or 10 minutes home. If this isnt enough just do one 20 in each shoe, never tell anyone of course.Human: Well this is a throwaway... my grandson is also on Reddit. Although he reads this forum and will probably see that I posted this. For Sam: How about just 40 of cash carrying?  <response>: Im 28 - 40 is reasonable but unnecessary. I use cash at the food truck every now and then or for a bridge toll. I could 100 survive with 0 cash. 100 is like... absolutely too much cash unreasonable. 