Any purchase should be possible with legal tender.
I will keep withdrawing my income in cash and inconveniencing others with cash transactions for every single purchase, including those exceeding this limit, out of principle.
Digital ledgers have proven to be unreliable. Anyone arguing otherwise hasn't witnessed bank runs, withdrawal limits, transaction limits, hyperinflation and war wiping out lifetime savings and destroying people's lives.
And you think a bag full of paper money in your basement will help you once bombs are dropped on your home town? How exactly will that help in war time more than money in your account that you can withdraw once in safety?
If you choose to deal with cash exclusively for the sake of it, so be it. But for everyone else, it’s just a less efficient way to move money from account A to account B.
Money that I have on my person, is always better than money that I cannot access.
There is usually at least a short lag between $DISASTER and $ECONOMY_COLLAPSE during which many people are happy to take cash and provide food, shelter and transport. Often you will have a steep inflation curve and rising transaction costs/exchange rates, but at least you are in control of the money that you have in your pocket.
The same cannot be said about digital money. Even though in theory you have a larger pool of places where you could spend it, money that is in your account isn't guaranteed to be accessible. Banks' infrastructure may be down, whether due to $DISASTER itself or corporate/political decision. The banks may impose withdrawal limits or a complete restriction on withdrawals and transactions. Online transactions may fail at any point in the acquirer-issuer-processor chain. ATM:s are likely to be empty.
Online transactions may be reversed. Even when you manage to "lock in" exchange rate X just before a currency's collapse in value, the merchant can and will cancel your order, make up excuses, and refund you the nominal value at the old exchange rate.
I will keep withdrawing my income in cash and inconveniencing others with cash transactions for every single purchase, including those exceeding this limit, out of principle.
Digital ledgers have proven to be unreliable. Anyone arguing otherwise hasn't witnessed bank runs, withdrawal limits, transaction limits, hyperinflation and war wiping out lifetime savings and destroying people's lives.