"I used to wonder why when you open an account with an exchange, they said trading crypto-currency is very risky, and made you acknowledge this fact"
this is in reference to the high volatibility of crypto's not to the possibility of getting robbed.
Although we all know that a day or another, the announcement "we've been hacked" will come (true or not btw).
For now bitfinex hasn't released any estimate of how much has been stolen, but if they use has much security as they say it is probably again an inside job. Wasn't it bitfinex which pas few weeks ago some network failure which forced them to shut down for a short period of time.
What I find funny in this one, is that it took place at the time when the bitcoin core dev and some big farm were meeting... (hopefully I don't have money in any big exchange... mostly because I don't have enough lol)
They did release an estimate recently and are claiming it was roughly 119,756 in BTC (an estimated $66 million in USD at the time of the theft).
http://www.coindesk.com/bitfinex-bitcoin-hack-know-dont-know/
Exactly. I recently got let into my account, they made up for losses by giving people a brand new coin called BFX which is a dollar backed coin. I am positive they got the idea from steem dollars, but I lost ETH LTC ETC and BTC and replaced with BFX I am not happy about this. My account was not hacked, but they used my currency to cover others losses. I am on Polinex now, but going to work on getting a cold storage wallet after this.