I always carry at least that much cash on me. You never know when you might need to flee a collapsing country on short notice or bribe a cop.

https://sneak.berlin/20191119/your-money-isnt-yours/

Can’t do that with your debit card.

In my view it is irresponsible to not carry on your person at all times your passport and enough money for a week of food and hotel and a plane ticket to the country of passport issuance. Carrying a card introduces working internet as a dependency for food and shelter, which is stupid and unnecessary.

Also, card payments are warrantlessly tracked at all times by the state, creating a location tracklog of where you go and when you go there.