The Treasury (under the executive branch) could possibly regulate crypto as a currency, but most likely this would require new legislation from congress to give

The Treasury (under the executive branch) could possibly regulate crypto as a currency, but most likely this would require new legislation from congress to give the Treasury the power to do so. https://www.pbs.org/newshour/economy/treasury-secretary-yellen-calls-for-cryptocurrency-regulation-to-reduce-risk-fraud https://www.pbs.org/newshour/economy/treasury-secretary-yell...