According to a new analysis, roughly 453,000 bitcoins have been seized by world governments authorities. This equates to 2.6% of the current circulating supply. Released this week, the report also states that 85.6% of the confiscated bitcoins came from just two incidents: the shut down of online black market Silk Road by the FBI (174,000 bitcoins), and a cybercrime shut down by the joint operation between SELEC (Southeast European Law Enforcement Center) and the Bulgarian government (213,519 bitcoins).
