Do you think the "hacker" will sell the coins in a hurry now when the price crashing?
I don't see why they wouldn't. They didn't pay anything for the coins nor did they put anything of any real value into getting them. It would be in their best interest to sell the coins in a somewhat expedited fashion so they can avoid more advanced blockchain analysis to be done to determine where the coins went and what their identities are
i can argue the opposite, why he need to sell if he got all those coins for free? it's not like bitcoin is going to die tomorrow
if i were him i would hold now that there is the halving, it would be utterly stupid to sell all those coins on exchange causing a big dumping and depreciate his coins also
remember that he can not sell 20k coin at the current price, the first half alone will cause a major drop...