So I've been wanting to use physical Cash instead of cards for any bills that don't accept BTC yet, but it is quite a headache for all involved given the 13 different denominations in circulation.
To solve this I believe I have figured out the most efficient Cash system, by reducing the denominations you use to only 6, allowing quick and easy exact change with no need to fumble with receiving anything back.
Simply carry with you:
* Paper denominations: $50, $20, $5.
* Coin denominations: $1, $0.25, $0.05.
The paper adds up to $420, a reasonable amount of buying power, in only 18 notes. And you can always withdraw extra $20s at an ATM whenever you need a top up. Also having only 3 note sizes means you don't have to search through your wallet for the right note: the back is $50s, the center is $20s, and the front is $5s, easy peasy.
While the 3 coins are visibly different in size or color from each other which makes selection from a single coin bag easy and fast.
Further, the beauty in the system is how simple it is:
$50: divides into 2 $20s and 2 $5s,
$20: divides into 4 $5s.
$5: divides into 5 $1s.
$1: divides into 4 $0.25.
$0.25: divides into 5 $0.05s.
Every step up of currency between $0.05 to $20 is either 4x or 5x. Very simple. While the $50 is able to be broken into the smaller units for more value density in a small amount of bills. Also, you very well might spend a $50 on a single bill and few places don't accept them unlike the $100. Since $20s are the bill likely used the most, it works well since that's the most common bill able to be withdrawn from ATMs when top ups are needed. 🤟
