Around 1410 GMT, bitcoin stood at USD 9,807.56 to record its lowest value since December 1 and a plunge of almost 50 percent since reaching a record high on December 18, according to data compiled by Bloomberg.
"There was clearly a significant speculative component to the rally late last year and the drop will be very discouraging to those that previously thought there was easy money to be made," Craig Erlam, senior market analyst at Oanda trading group, said of bitcoin's drop below USD 10,000.
"The panic-selling seen across all the major cryptocurrencies could be attributed to a possible regulatory clampdown in South Korea with authorities threatening to place an outright ban on cryptocurrency trading," noted David Cheetham, chief market analyst at XTB.
"Having said that, this narrative has been around for many weeks now and isn't really new but it has once more raised the spectre of tighter regulation on this market.