As along time traders. Top rank coins is not as profitable as the low one but just the risk is what is the difference. Cryptocurrencies market demand wisdom to really make money from it and one of the investment strategies people used is to invest in a low coins so that with little cents increasing they can sell at profits.
Low volume coins can give big profit, but it is back to it is nature, big profit give big risk, when it is delisted from market means it will not have value anymore. But when it get pumped, it can reach big price easily.