I don't treat US change as worthless (except maybe pennies) but I mostly toss it in a bucket at home and very occasionally feed it into a machine at the local grocery store that converts it to an Amazon gift certificate or whatever. $1 bills fit into my wallet just fine so nothing wrong with them although I don't use cash much day-to-day.
I also use the machines to convert coins into Amazon cards. When I get paid I pull out 600 so I have about 20 a day for food and entertainment money. My spare quarters go to laundry. And the rest of the coins are pretty much shoe/boxers/socks money. I only use my debit card to pay Comcast and PGE.
