First time visitor to
Gives a roadside vendor 1000 naira note for 2 pieces of gala sold at 100 each, in the middle of a Red traffic light
Their change is 800 NGN, they have 10 seconds or less to verify that the vendor gave them exactly 800 NGN
Which was folded, because the vendor didn’t want the wind to blow away their money while holding the goods in the other hand.
This scenario can apply to both users. But more importantly first time and visually impaired users of the currency need to be accounted
It's important to consider typography and scale when designing such a critical product.
Also these key element
Currency number representation
Anti counterfeiting elements
Historical sensitivity to past designs
Must be accounted for
What inspired this tweet in the first place.
If I were to put these ideas into practice, though not exhaustive, this is a not so-exhaustive list of how one could approach it.