We should not invest in tokens that are almost as popular as dead tokens. I have not encountered NWC and SGC before I read this thread. You should probably give a word or two about these tokens so that we can have a little idea about them, what they are for, how they are developing so far, etc. And Dcoin exchange is as unpopular as the two tokens you have mentioned. I don't have any reason to invest in them in an exchange that is also unknown.