True. But there is no way in hell you can stop people paying with their smartphone or plastic card so those costs are fixed. An anecdote: during COVID people h

True. But there is no way in hell you can stop people paying with their smartphone or plastic card so those costs are fixed. An anecdote: during COVID people had to use shopping carts in the supermarket (social distancin). Those trolleys needed a 1 euro coin inserted in them to unlock. Chaos ensued because many customers were not carrying cash- let alone coins.