You can make investing in any coins you want, and you should make your analysis and don't depends on other people analysis because they cannot always right. With the information from CMC, you can see how good the coins in 24 hours and else, you can see the position of every coin but still you need to search on another source to find more about the coins.
Or he can take into account the analysis of other people because their predictions are part of the "mood" of the market. After estimating the value of the coin by himself and comparing with the state of the crowd, he can come to the conclusion whether he should buy it now or not.