I have not heard about cryptsy before. Was it a big exchange? I can not believe that an exchange can turn into a scammer after one night. Damn. If we can not trust the exchange, how can we trade our coin and make profit with it? how can we buy other cryptocurrencies without an exchange?
Cryptsy was not that big of an exchange but it was a really good one when it was still up. This story is pretty usual in cryptoworld so don't trust any exchange in storing your coins but still you can trade and make profit with it. Just remember that if you plan to hold long term, put it into a safe wallet that you control/ own the private key of the specific wallet.