An online auction is scheduled for December 4 for the Bitcoins, valued at nearly $19.8 million (roughly Rs. 122 crores). It would be the Marshals Service's second such auction following an earlier one in June for almost 30,000 Bitcoins seized during the 2013 raid on Silk Road.
The latest batch of Bitcoins was found on computer hardware authorities said belonged to Ross Ulbricht, who prosecutors accuse of creating the underground website.
Authorities say in pursuing the case, the government has recovered 173,991 Bitcoins, including about 144,336 recovered from computer hardware belonging to Ulbricht seized at the time of his arrest.
As part of a civil forfeiture proceeding, Ulbricht and the government in January reached a deal in which the Bitcoins on his hardware would be sold, with the proceeds to be held pending the outcome of his case.
Potential bidders for the 50,000 Bitcoins, which will be offered in 20 blocks, must register by December 1. Winners will be notified December 5.
The remaining 94,341 Bitcoins from Ulbricht's hardware will be auctioned "in the coming months," said Lynne Donahue, a Marshals Service spokeswoman.
Ulbricht, who prosecutors said was known online as "Dread Pirate Roberts," faces trial Jan. 5 on charges including conspiracy, narcotics trafficking, and continuing criminal enterprise.
Ulbricht, 30, has pleaded not guilty. His lawyer declined comment Monday.
Bitcoin prices were up 1.79 percent Friday at $395.49 per coin, according to the digital currency news website CoinDesk.
© Thomson Reuters 2014