"
much ado about nothing" - a great fuss ("much ado") is made of something which is insignificant ("nothing") ...comes to my mind, when I look at this.
A once off dump of $1 Billion Dollars worth of bitcoins is definitely not going to trash the Bitcoin price for a long time, because that is just a drop in a bucket of the $125 675 135 876 USD market cap.
A Reddit user mentions Silkroad and every media platform jumps on the opportunity to create a sensational story around it.