We promote the use of cash due to the following reasons
cannot be freezed
you do not need to share all your purchases with the government or your bank
usable even if you forget your credentials, your bank fails or cash payment services go down
you can buy cool stuff even if the internet goes down
can be used even if the end is near
Therefore always hold some cash. In addition, holding cash makes you act more reasonably with your money. You can’t just lose it with a couple clicks. If you pay with physical cash bills you tend to be more mindful about your purchases and spend them in a reasonable way.