Earlier today, U.S. authorities added regulations aimed at thwarting the use of digital currencies and assets to evade sanctions.Ukraine's Ministry of Digital Transformation is sending official letters to eight cryptocurrency exchanges, requesting them to stop servicing Russian users because of concerns that digital currencies are being used to evade sanctions. The ministry is reaching out to Coinbase, Binance, Huobi, KuCoin, Bybit, Gate.io and Whitebit, along with Ukrainian exchange Kun...