I know of many coins that is the native cryptocurrency tokens which has their respective exchanges. One of these coins is COS. COS is a cryptocurrency token built on the Ethereum blockchain technology, it is the native cryptocurrency token of the COSS exchange.
I don't think COS is a good idea for cryptocurrency traders because it is still a very new token and I don't know any exchange that supports this token because it is still a new token. However, I made a research on it and discovered that it is supported on Pancake exchange and Binance exchange but I was able to clarify that it is not supported on Binance because I do trade on Binance.
However, COSS exchange is a very good exchange and I trust it, COS is supposed to be supported by its own exchange. Finally, I have never traded with COS but if you would like to trade with it, you can make research on it to know which Exchange supports it.