Well, this is a necessary and temporary measure in the context of the war with Russia. Such a measure must be treated with understanding. The National Bank of Ukraine seeks to maintain its financial system in the face of Russia's destruction of Ukraine's economy and infrastructure. These measures are much softer than in Russia now, where citizens are completely prohibited from buying dollars and euros. Instead, you can buy Chinese yuan there. In addition, there is currently no official market exchange rate in Russia, and this is very harmful to the Russian economy in the short term.