The way you treat different denominations of currency probably says something about both your temperament and about the relative values of different currency units.
When I get pennies, for example, I discard them at the first opportunity. Pennies just aren’t worth carrying around.
Dimes and nickels, I put in a big glass jar. In times of extreme cash need, I may pick out a bunch to buy some ramen noodles.
Quarters and loonies I save for laundry.
Twonies (Toonies?) I save for coffee.
I am pretty happy about the relative sizes of Canada’s denominations. It’s good that the more valuable coins are generally larger. I feel a bit like pennies are a waste at this point. I suppose how you feel about them depends on how many small cash transactions you undertake each day.
In Australia, they no longer have pennies. They round to the nearest 5 cents. Works like a charm. Super simple.
Canada should follow suit.