Ernst & Young revealed today that it has successfully auctioned off 24,518 bitcoins worth around A$22 million ($16 million) as part of a scheduled auction after the Australian government confiscated the bitcoins from a Silk Road user.
You can see there is margin between actual ($22 milliion) and buy price ($16million) so they will hold or keep selling small amount at a time to get that $6 million in profit, money attracts money. Link to the source of this news will be good to be posted in this thread.