Bitcoin rose 5.63 % to $49,337.72 by 0800 GMT on Sunday, adding $2,628.83 to its previous close. Bitcoin, the world"s biggest and best-known cryptocurrency is up 77.9% from the year"s low of $27,734 on Jan. 4, and down 24% from the year"s high of $64,895.22 hit on April 14. Ether , the coin linked to the ethereum blockchain network, rose 6.1 % to $3,868.42 by 0800 GMT on Sunday, adding $222.41 to its previous close.