Bitcoin has plunged 16% after a bruising day in Congress for Facebook's digital coin, Libra.
"Facebook has burned down the house over and over and called every arson a learning experience," Sen. Sherrod Brown said.
Brown's comments follow criticism of Libra from the Treasury Secretary, the President Donald Trump, and the Fed Chair.
There has also bee criticism from the head of the House Financial Services Committee, Rep. Maxine Waters.