The Japanese government asked domestic cryptocurrency exchanges on Monday to halt transactions with Russian and Belarusian organizations and individuals sanctioned following Moscow's invasion of Ukraine.The request came after seven Russian banks were excluded Saturday from a key international payment network known as SWIFT. Since cryptocurrencies are not transferred via banks and restrictions vary in countries and exchanges, concerns have been growing that such currencies may be a loophole to sidestep some sanctions.The request also came after Group of Seven leaders recently affirmed that R…READ FULL ARTICLE