Buying and holding 1M BTC would cut US debt in half, says Senator Lummis.This is based on the best modeling available if you hold Bitcoin for 20 years.Bitcoin's historical returns have outperformed the S&P 500 and other equity markets.Bitcoin is down 10.4% since the start of 2025, while the S&P 500 is down 15.3%, and the Nasdaq Composite is down 20.9%.