is it possible that someone got the mail with which you have registered at bitfinex. then he/she created an account and so knew the password. then he/she changed the mail adress in the account so you can log in and trade, so he/she then would log in and steal your btc, but you changed the password. so it was just kind of phishing.
No, for I never ever registered with Bitfinex.
Why did they risk losing all these coins? I mean these coins now might be owned by bitfinex. And when no one asks for them then they can keep it.
Why risking that the owners of the email get an email and login? I mean they would lose it pretty fast then. I dont understand this.
By the way... the owners of these emails could have taken the bitcoins too, then claiming the hacker did that.
This all makes no sense to me. At least they could have created accounts with 1 Bitcoins in it. When they are gone then the email is still in use and the owner cares and didnt think its spam.
What did they try to do with the coins anyway? They should have sell and withdraw. End of story.