https://www.reuters.com/article/us-global-bitcoin/bitcoin-jolted-by-regulation-worries-tumbles-11-percent-on-extended-sell-off-idUSKBN1F60CH >Bitcoin skidded more than 11 percent on Wednesday, extending a precipitous downturn in fortunes with investors spooked by fears regulators might clamp down on an asset whose value has skyrocketed in the past year.