Very often exchanges shows fakes volumes on coinmarketcap, that is why many traders do not trust coinmarketcap.
May be traders do not trust coinmarketcap but they use coinmarketcap. Listing on coinmarketcap is necessary for the promotion of exchange and token.
Many tokens are not listed on coinmarketcap. I can not understand why it is so. KNL is already traded on big exchanges, but why there is no listing of the tokens on coinmarketcap?