Whoever got these wallets better sell them and get a good security company on rotation quickly before anyone find out who they are. Seems like wrench attacks been been happening a lot more the last year.
I don't really get these; there's not a ton of difference between using a wrench to threaten someone with a bunch of Bitcoin vs using a wrench to threaten someone with a bunch of any other liquid asset that could be used to buy bitcoins.
Bitcoin doesn’t ask questions when you unexpectedly want to make a very large transfer to a new payee. Your banker will.
But exchanges will if you deposit that much, and will freeze your $ if they don't like your response.
Why would you even use a central exchange? It makes no sense. The person holding an absurd amount of coins would not be stupid to throw it all away like that