Under the 2012 STOCK (Stop Trading on Congressional Knowledge) Act, congressional members and other government employees are mandated to report stocks, bonds, and cryptocurrency trades of over $1,000 within 45 days of executing them.
Here is a compilation of the top 5 crypto choices, and a few little-known extra choices:
Top 5 crypto choices in the US Congress
The first is Bitcoin ($BTC), the most widely held asset among legislators. Wyoming Senator (Sen.) Cynthia Lummis, a prominent speaker on crypto policy, disclosed her first Bitcoin purchase in 2013. Others who have made $BTC purchases include Sen. Ted Cruz and Representatives (Rep.) Byron Donalds and Guy Reschenthaler, with reports of individual holdings worth up to $250,000.
coinpedia.org

