The Bitfinex Bitcoin Hack: What We Know (And Don't Know)More than $60m worth of bitcoin was stolen from one of the world's largest digital currency exchanges yesterday, and nearly 24 hours later, the event is still shrouded in mystery.
What is clear, though, is that the impact is far-reaching.
The Bitfinex theft represents the largest loss of bitcoins by an exchange since Japan's infamous Mt Gox lost 744,408 BTC in early 2014 (worth $350m), a breach that would ultimately cause it to cease operations....
http://www.coindesk.com/bitfinex-bitcoin-hack-know-dont-know/