The article discusses how the currency security of Ukraine's banking system is affected by exchange rate instability and the level of foreign currency deposits. The researchers found that a decrease in exchange rate stability can lead to banks losing foreign currency deposits, which harms their financial security. They suggest making changes to currency regulation, such as setting higher reserve rates for foreign currency deposits to make them less attractive for banks. This could help reduce the reliance on foreign currency in the banking system and lower the risk of lending in foreign currency.