According to Bitcoincom, U.S. Treasury Secretary Janet Yellen has highlighted concerns about Russia's use of cryptocurrencies to evade sanctions. She noted that the U.S. Treasury is "very concerned" about Russia's use of cryptocurrencies, and while this may not be a major issue at the moment, it could become more of a concern as sanctions intensify. The Russian Central Bank recently recommended that companies use cryptocurrencies and digital assets to mitigate the impact of Western sanctions.