you had to wonder when this big old pile of cash was going to move, apparently the silkroad drug traders were the world biggest hodlers out there, moved after 4.5 years of inactivity, and has a potential to rock the market in the sheer huge volume it holds, Bcash will obviously fair no better, because this amount also holds true for for bcash as well.
full analysis here and discussion here
https://www.reddit.com/r/Bitcoin/comments/9ceb5v/1b_bitcoins_on_the_move_owner_transfers_100m_to/