Comment on Congress sets sights on federal cryptocurrency rules amid bitcoin craze

WASHINGTON — Jolted by the global investment craze over bitcoin and other cryptocurrencies, U.S. lawmakers are moving to consider new rules that could impose stricter federal oversight on the emerging asset class, several top lawmakers told Reuters.Bipartisan momentum is growing in the Senate and House of Representatives for action to address the risks posed by virtual currencies to investors and the financial system, they said.Even free-market Republican conservatives, normally wary of government red tape, said regulation could be needed if cryptocurrencies threaten the U.S.