I can't even find these coins.
what is NWC and SGC buddy ?? i just heard about this token from your thread
I've also heard it just now so I don't think that I can suggest to invest with these coins. Dcoin is not even a popular exchange so but the volume for bitcoin and top coins is good. What matters is the value of the altcoins of what you are asking op.
and as i knew Dcoin is a small exchange with low volume, maybe you should think twice about your choice buddy
It has a competitive volume though I don't trade there.
https://coinmarketcap.com/exchanges/dcoin/