There are many ways to earn a profit from crypto but the best way is to only trade the long-standing coin such as ETH, LTC, BTC, NEO, VIEW
Look at cryptocurrencies like the stock market. It can go up, it can go down, it can stay stable for however long. How do you take advantage and or make money off of this? It's either you trade regularly (buying low, selling high, ofcourse) or invest in it, hoping that it would go up in the future.