Okay, so, this is another brief interjection.
I don't see change going anywhere for a LONG time. Altered, maybe (as in the example of getting rid of the cent), but not disappearing. Here are five places I could have used cash and coins and
only cash and coins in the last week if I hadn't been working, or actually did use change:
--A Mexican lady's "tamale stand" down near Apollo's, which is actually a cooler filled with those foil hot/cold bags, and a sun umbrella
--A yard sale
--The tip jar at Five Guys (actually, I did do this)
--not applicable to me but very applicable to parents: your kid's allowance
--The Ronald McDonald House box at McDonald's
And a bonus:
--A kid at my work who wanted a doughnut and came up
Two Cents short because at six years old he didn't really grok sales tax yet. I fished a couple of pennies out of my pocket and tossed 'em in my coworker's drawer.
"But," I'm sure those of you with iPhones are thinking, "What about Square?" Sure, Square is a great invention, and grandmas with trendy granddaughters willing to give up an afternoon to babysit Grandma's yard sale may make cash obsolete at
some yard sales. But do you think the Mexican lady who sells tamales has an iPhone? (let me answer that question for you: I've seen her cell phone. I'm pretty sure it's from the late 1990s.) What about the tip jar at Five Guys? Having worked at a place with a tip jar I can tell you that at the end of each day they get divvied up between all workers, so the cook gets tips as well as the cashier. Trying to use Square or similar software for the tip jar would be a
nightmare. What about your kid's allowance? Sure, a teen may have a Green Dot card or something similar, but what about your six-year-old--or, for those of you with adult kids, what about the boy who mows your lawn?
Hundreds of things would die with the death of our coinage. Lemonade stands. Small businesses or initiatives that can't afford a digital hookup*. Tip jars. Local charity jars ("Sarah has been diagnosed with a rare form of cancer, please help her family with your spare change"). The charity "Dollar Dance" at weddings. Flea markets and yard sales--the older folks who always have the most fascinating junk are those least likely to have things like Square hookups, and this would round-robin until people saw no point in going to them anymore. And what about that most common act of courtesy--the man who taps a distraught woman on the shoulder when she discovers she's two dollars short to pay for her kids' treat and it's the end of her paycheque, and says "Ma'am? You dropped this" and hands her $5 so her kids can have their treat and she can have her dignity?
I don't think American society would readily accept all of these changes--not this generation, probably not for another 2-3 lifetimes--long after all those who can remember a world where cash was normal are dead. And even then--can we be sure? I would say we can't count on the death of cash and coins until the day that Little Jimmy can afford his own Square hookup to run his lemonade stand. Too much stands to disappear otherwise.
*e.g., the kid you see on every college campus who offers to edit your term paper for a buck per page. This kid might have an iPhone with Square, but it's equally likely he/she doesn't. I was this kid, and I didn't--I couldn't even think about affording one. This also encompasses teens doing odd jobs for money and offering your neighbor thirty bucks if you can borrow his pickup to move your sofa to your new place.