Probably the reason for the dip. The thing is there's so much legal nonsense wrapped up in the redistribution of those coins that they probably won’t be released for another 18 - 24 months at least.
The dip was due to some other events, I believe, and that 130k plus would be sitting on that stash for a long time. Also, with the years people waited to get reimbursed, I doubt they’ll immediately sell to recoup the loss, especially now that bitcoin is in a roll and is poised to get higher than the 2017 ATH. A majority of those people would probably hold until they see some profits for those idle coins. Better to seek something good out of it, in this case more profit.