By token bancor, nothing has disappeared, the very fact of hacking is of course very unpleasant, but I think the team will draw conclusions and will do everything possible so that such situations no longer repeat. Meanwhile, the price for Bancor is gradually beginning to recover.
Even this was mentioned before about some security holes and it could lead to a big lose if someone made hack attempting on this network. But they ignored this warning in past and didn't took this seriously and now after this incident they have their focus to make secure this network and fixing all bugs there. That is the reason price is start recovering I hope in future this will become secure network.
Nature learns through catastrophes, and so do humans. Even though if would have been obviously better to secure the network thinking in advance that something like that could happen, nevertheless it's OK to do it later as well, especially as major damage has been avoided.