Bitcoin rose 6.54% to $57,098.08 on Friday, adding $3,504.11 to its previous close. Bitcoin, the world"s biggest and best-known cryptocurrency, is up 105.9% from the year"s low of $27,734 on Jan. 4. It is down 12% from the year"s high of $64,895.22 on April 14. Ether , the coin linked to the ethereum blockchain network, rose 1.06 % to $2,787.35 on Friday, adding $29.29 to its previous close.