Are coins on CoinMarketCap legit?

I'm curious to know, are the coins listed on CoinMarketCap legitimate? I've heard of some sketchy cryptocurrencies floating around, and I want to make sure that the ones I'm investing in are trustworthy and have real-world use cases. Can you shed some light on the legitimacy of the coins featured on this platform? Is there a rigorous vetting process in place to ensure that only legitimate coins are listed? I'd appreciate any insight you can provide on this matter.