Im starting to worry about coinmarketcap lately, after series of deceit and spammish activity
The following are my observed reasons
1. Many dead projects still on cmc
2. Market cap is fake Cox many projects which have seized to trade adds up to the market cap
3. Cmc doesn't verify authenticity of projects before listing it
4. CMC now have ads of fake icos on their website thereby leading people to scammers
Funny enough so many NOOBS believe anything and everything dey see on cmc to be authentic
Let me stop here and anyone against it should bring a proof to counter it
Or offer more options
You can use an alternative resources. Guys from openmarketcap done a great work for example. You even can watch for data difference in comparison to CoinMarketCap
https://openmarketcap.com/exchanges/difference