For a long time, I did not trust the evaluation and display of CMC. The number of fake volumes is huge. The figures here are not realistic. If in the top 10, I think of Binance, okex, houbi, ... but I don't see it here lol.
I think you're wrong judging coinmarketcap site displaying with fake volumes in the cryptocurrency world. CMC site has the only trusted company that monitors the real volume of each coin. Including the ranks of every coin and exchange.
CMC is well known in the industry for taking volume figures from exchanges and not verifying it. YOu can find quite a few articles on that if you search. Linking to one of the better written ones here: