Japan

In February 2014, Mt. Gox—once the world's largest Bitcoin exchange—abruptly suspended trading and went offline, revealing the theft of over 744,000 Bitcoins worth approximately $450 million. The collapse exposed critical vulnerabilities in early cryptocurrency infrastructure and led to the arrest of CEO Mark Karpelès, a French businessman who had acquired the exchange just three years earlier.

On May 12, 2017, the WannaCry ransomware attack struck more than 300,000 computers across 150 countries, but its impact on Britain's National Health Service proved particularly devastating. The attack infected at least 80 NHS trusts and over 600 primary care organizations, forcing hospitals to cancel thousands of procedures and revert to pen-and-paper record-keeping.