[us audit watchdog: to step up supervision of auditors involved in encrypted currency transactions] the US audit regulator said on Wednesday that when auditors review the financial statements of companies involved in encrypted currencies, there are deficiencies in eradicating abnormal transactions and assessing whether cryptocurrency mining revenues are recorded correctly. The Public companies Accounting Oversight Board (PCAOB) has released a high-profile overview of the results of several years of inspection, assessing how auditors test their clients' encrypted transactions or assets held.