They should, it's their responsibility to provide correct figures to the people, maybe they just don't want to make things complicated on their part and they don't do much verification on their part.
I'll try coingecko, I accessed it every once in a while but I still use coinmarketcap most of the time, I'll try to explore it more.
Thanks for sharing this.
yes, CMC and COINGECKO are the sites I see most often to determine the assets that I will trade on a daily basis. maybe trade manipulation makes a lot of daily traders trouble. but I have believed in just a few exchanges for my daily trade.