It sounds so ridiculous for anyone to invest just because a coin is on the top list on cmc, that's the worst investment decision imo.
Invest in a project base on quality, standards and team, it can be a new or already existing project but it shouldn't be because of the top 100 list, the position is not permanent.
Actually it's not wrong to buy the altcoins cmc top list, because actually most of these altcoins have reliable project teams, clear roadmaps and also pretty good quality, I think coinmarketcap has done a lot of research before actually including these coins on their list have especially altcoins that are in the top ranking, whether or not we are bad at investing is only based on our ability to choose the time and also make decisions when entering the market, I have never thought that choosing the top altcoins is a ridiculous thing especially since we know altcoins like BnB , Eth, Usd, Usdt and others are the altcoins that have the biggest fans.