European banking cyber attack warning? Greek analyst Christos Kastomonitis issued a cautionary statement regarding the robustness of Europe's banking infrastructure. “Friendly advice: keep some cash handy. Within the next 15 days, I predict there will be a major cyber attack on the European banking system. Kastamonitis notes that he has spent a lot of time discussing cyber threats and emergency preparedness, including the idea of 72-hour survival kits. Although this remains his personal assessment and not a confirmed forecast, the warning serves as a reminder of the importance of preparedness and financial emergency planning.