If you follow the raiblocks explorer the stolen Nano was mostly sent to Mercatox - probably dumped over a few weeks as this started in November.
Looks like dles was on to the shady bitgrail wallet activity but it didn't get traction: https://www.reddit.com/r/RaiBlocks/comments/7u2emy/i_need_some_help_with_tracing_funds/
Example transaction feeding to Mercatox: https://raiblocks.net/account/index.php?acc=xrb_3bkkiyqfbwzaedk4ee4qbddtjjq16zuxaphfuyq7miipg5kikqw6zx5m5wxx
Probably safe to assume the majority of the nano has been converted into Bitcoin/Monero/etc. and is now untraceable. Not sure how much can be recovered here. It's hard to believe this was a hack. How could Bitgrail not realize that all the people on the exchange held 19mm Nano while their wallet held only 4mm? If this was a couple hundred thousand nano missing or maybe even a million, then sure a hacker took it. But when you've been doing shady shit like shutting down withdrawals and when there's a 17mm shortfall, everything points to one thing: exit scam.
Cioè, loro basano il loro racconto sulle TX che io ho fornito, accompagnandole con mail e log, e ancora son convinti sia exit scam?