Bitcoin dropped 4.94 per cent to $36,007 at 2117 GMT on Thursday, losing $1,870 from its previous close. Bitcoin, the world’s biggest and best-known cryptocurrency, is down 5.2 per cent from the year’s high of $37,978 on November 9. Ether, the coin linked to the ethereum blockchain network, dropped 4.86 per cent to $1,959.8 on Thursday, losing $100.2 from its previous close.