This left Bter to sort out their problems, which they did. They paid off the thief, and most of the stolen money was returned to them. Bter are hurt, but not enough to destroy them. They are able to make their customers whole, which is the important thing. We don't have to worry about 50m NXT getting dumped onto the market.
It's been interesting to watch. One of the most fascinating proposals, when it seemed Bter had lost the coins forever and would not be able to repay their customers deposits, was for them to create 50m units of an asset on the Nxt Asset Exchange and distribute them to all the customers they owed, to represent the debt. Bter could then buy this asset back at whatever rate they could afford. For example, since the thief returned 5M NXT quickly, Bter could offer to buy their asset at 0.1 NXT per unit immediately. Over time, by putting money aside from their exchange profits, they could offer higher prices until they could afford to pay the full 1 NXT per unit (estimated to take about 3 years). Users could either accept 1 NXT in 10 if they were greedy and sell, or hold onto the asset for the full three years. As an asset, the debt could be traded on the exchange, so people who trusted Bter would repay the debt could buy from those who didn't. As it turned out, this wasn't necessary, but I think it would have enabled Bter to survive and maintain a degree of public trust.
It's worth re-iterating that the hack was due to Bter's poor security, and they have accepted full responsibility for it. Nxt itself is and was secure, and its performance has been exemplary through out. You should have more confidence in Nxt now than in currencies which have not been tested.