The link : WTF is a bitcoin ETF? (Click) WTF is a bitcoin ETF? : The Indicator from Planet Money On today's show, we find out what the buzz is around something called a "spot bitcoin exchange-traded fund." Despite a volatile year for cryptocurrency companies, U.S. federal regulators are expected to approve this new financial product. So WTF is a bitco www.npr.org SYLVIE DOUGLIS, BYLINE: NPR. (SO..