Senators Pat Toomey and Cynthia Lummis sit on the powerful Senate Banking Committee and have been advocates for a light government touch towards the growing — and largely unchecked — cryptocurrency market.

They also own cryptocurrency assets. Lummis's roughly $250,000 of bitcoin makes her the most heavily invested US lawmaker in the digital asset. Toomey has smaller holdings in crypto-related investment vehicles. Together they are the only two senators with such investments, according to a Wall Street Journal review of public financial disclosures.