(Updated by Endah)
Who owns the single largest Bitcoin wallet on the internet? The U.S. government.
In September, the FBI shut down the Silk Road online drug marketplace, and it started seizing bitcoins belonging to the Dread Pirate Roberts — the operator of the illicit online marketplace, who they say is an American man named Ross Ulbricht.
Read more here http://www.wired.com/wiredenterprise/2013/12/fbi_wallet/