(FILES) This file photo taken on June 17, 2014 in Washington, DC, shows bitcoin medals which use peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network.  Cryptocurrency fans have counted Tesla boss Elon Musk as among their champions, but this week he rocked their world by questioning the future of the digital assets and singling out carbon emissions from bitcoin mining for particular criticism. "Energy usage trend over past few months is insane," Musk tweeted on May 13, 2021, sharing a chart from the Cambridge Bitcoin Electricity Consumption Index (CBECI), his latest missive in a salvo that's caused bitcoin's price to drop.
 / AFP / KAREN BLEIER
Bitcoin remains about 70 per cent higher for the year and is more than 1,000 per cent higher than its 2020 low of $3,850.. Photo: AFP

Bitcoin drops after US probes crypto exchange Binance




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