Hopefully, this doesn't lead to massive dumping.
cryptsy wallets were cleaned up (sold on Bittrex) long ago it was warned here when it happened. Besides that all coins still in Cryptsy's control are gone for sure even if they really recovered part of the BTC.
I hold my coins on bittrex are they safe there ?
I would suggest you hold it yourself any exchange is safe until something happens.
That's why everyone should always make sure to hold their coins in their own wallets unless they are trading it on daily basis why people trust a third party they never met in person more than they trust themselves is not plausible.