I hoard nickels. If I get one I won’t spend it and I will use dimes and quarters in any permutation that will get me a nickel back in the change. Pennies dimes and quarters pile up and when I get a bunch I will put them in a self checkout at Walmart which accepts coins. I really hold up the line because it counts real slow.
The reason I hoard nickels is that they have the same metallic content today as when they were first made: copper and nickel.
I save pennies before 1982, and quarters, and ANY silver I still find.
Interesting about the nickels.
Quarters are still invaluable at the laundromat.
I am also starting to save brass and lead.