A bitcoin exchange is a shady business, no regulation exists. So it is a freespace for criminals and hackers. You hustle or you will be hustled. This guy should have made a withdrawal by any means. In the bitcoin business only your wallet file counts, the rest is just a big hustle. And please forgot that you're able to sue somebody over a bitcoin dispute.
Would you be surprised to hear that ForEx (the method of exchanging currencies like the USD, EURO, and YEN) are also unregulated?
"Unlike stocks, futures or options, currency trading does not take place on a regulated exchange. It is not controlled by any central governing body, there are no clearing houses to guarantee the trades and there is no arbitration panel to adjudicate disputes. All members trade with each other based on credit agreements. Essentially, business in the largest, most liquid market in the world depends on nothing more than a metaphorical handshake."
