(FILES) In this file photo taken on January 26, 2020 The photo shows a physical imitation of a Bitcoin in Dortmund, western Germany, on January 27, 2020. The value of leading cryptocurrency bitcoin fell on January 11, 2021 by 20%, wiping out some of the huge gains racked up in recent weeks, as financial markets became more cautious. The virtual currency fell to $21,061.83 according to the Bloomberg financial news service, a level last seen in March 2020 as the coronavirus pandemic sparked panic