Depends on the coin really. I don't see blackcoin as a coin that people are just going to dump as soon as it gets listed on cryptsy. Most likely the price will even out with the other exchanges, which is a good thing.

Now look at the other trending coins being voted on like continuum. That's a dumpcoin. Huge block rewards, huge early mining incentives, it gets listed and shoots down to 2 sato almost instantly thanks to people dumping. And then you see huge sell walls worth hundreds of bitcoins just pile up and no one ever breaks through them because no one buys.

People are buying blackcoins right now, however, and we even have our own multipool. I just can't see blackcoin getting majorly dumped any time soon.