I usually invest in altcoin that are in the top 100 on coinmarketcap, because in my opinion investing in altcoin that are in the top 100 on coinmarketcap will definitely give me a big profit in the long term and the risk is also small, so in my opinion you don't need to bother looking at all altcoin on coinmarketcap, because if you want to invest in altcoin that can give you profit with a small risk, then you only need to research altcoin that are in the top 100-300 on coinmarketcap, because altcoin must already have a product and high volume, so the risk is definitely smaller and of course the price will continue to increase all the time.