Bitcoin rose 3.95 per cent to $31,187 at 17:05 GMT on Monday, adding $1,185 to its previous close. Bitcoin, the world’s biggest and best-known cryptocurrency, is up 17.5 per cent from the year’s low of $26,533 on October 11. Ether, the coin linked to the ethereum blockchain network, rose 1.39 per cent to $1,687.3 on Monday, adding $23.2 to its previous close.