When a content update by the cyber-security giant CrowdStrike caused millions of Microsoft systems around the world to crash on Friday morning, bringing the operating systems of banks, payment card firms, airlines, hospitals, NHS clinics, retailers and hospitality businesses to a standstill, businesses were faced with a stark choice: go cash-only, or close until the systems came back online.
This is one of the most important arguments in favour of cash: the resilience it provides to a country's overarching payments system. Put another way, cash does not crash. It does not fail in a power cut or seize up during a cyber attack or software outage (though, of course, ATMs might).
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