I always try to carry at least $20 in my wallet at all times, and I usually do keep a small stash of cash at home for emergencies. When the pandemic shutdown was looming up and it was clear what was about to happen, I took the precaution of going to the ATM and withdrawing some extra cash to have at home just in case I would need it.
Coins are a nuisance and whenever I have used bills as payment and received a handful of coins, when I get home first thing I do is dump them into a bowl I keep on the sideboard, and when the bowl fills up I spend a little time sorting the coins and putting them into coin wrappers, which I take to the bank and either deposit into my account or get bills in exchange.