Bet the USA brothers wish they had pretty money like ours lol
Honestly? US currency is dumb. The bills are all the same color and size, unlike pretty much everyone else where it's super easy to tell a denomination by either. We have to look at the numbers and dead guy on it, so you're thumbing through your wallet to see where the $20's turn into $10s turn into $5s, etc. Even blind people can recognize their currency by feeling the size of it with most currencies, in the US they have to have someone they trust fold it a special way and trust the shopkeeper to be honest. The coins are a random distribution as far as size to value, a legacy of when actual silver/gold coins were in circulation but meaningless now.
If I were king for a day, I'd stop minting pennies, dimes, $2s, $10s, and $50s. Coins would be nickels and quarters only. Bills would be $1, $5, $20, $100 only.
But it's buying power can't be argued with and most of it exists as electrons anyway.