Bitcoin, the world's biggest and best-known cryptocurrency, fell more than 4 percent on Tuesday as it extended a decline through a week that also included an upgrade to its blockchain.
Bitcoin fell to $60,350 at its lowest for the day, taking losses from a record high of $69,000 struck on November 10 to more than 11 percent.
Ether, the second-biggest cryptocurrency by market value, was down 4.5 percent at $4,355.4.
Cryptocurrency analysts said there did not seem to be any news driving the declines, and the moves seemed driven by profit taking after the sharp run-up.
"There is a lack of news and this is some pure selling of spot and some additions of short selling. Outside of this, there is no significant news," said Matthew Dibb, chief
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