The harsh sanctions imposed on Russia and the resulting crash of the ruble have the Kremlin scrambling to keep the country’s economy running. For Vladimir Putin, that means finding workarounds to the Western economic blockade even as his forces continue to invade Ukraine. Former Treasury Department officials and sanctions experts expect Russia to try to mitigate the impact of the financial penalties by relying on energy sales and leaning on the country’s reserves in gold and Chinese currency. Putin also is expected to move funds through smaller banks and accounts of elite families not covered by the sanctions, deal in...