Bitfinex should negotiate with hacker. Offer $10 million to return the stolen bitcoins and drop investigation.
Yeah, this could be done. However I think hackers will not accept the offer, because they prefer to earn much money instead of having to return all funds they have get and given only a small portion of the money to them. But it also depends on how bitfinex the hacker in the negotiation to seduce, hopefully this issue was quickly completed and running as before
Reasons hacker might agree to negotiate:
1) The advantage of not being investigated might outweigh the difference in lifestyle between having $10 million and $60 million.
2) If he keeps a portion of his settlement in BTC, the price will rise after she agrees to settle.
3) If he takes a long position in bitcoin before agreeing to settle, he will profit.
4) He will be seen as a hero by many instead of a theif and will be sought after for security advice.
5) He will be able to convert his BTC to USD easily.
What makes you think the kid in his parents basement running Bitfinex has $10 mil?
Chances are, he started cashing out bitcoins months ago just waiting for time he could release news of the "hack". Shortly before the "hack" he probably sold most of what he needed to in order to retire to Panama. He can slowly trickle out the rest over the next few years. Pure genius.