For a long term investments and long term profits , i would like to recommend bitcoin and etherium. Because both of this coins has a big gained when it comes in earning a lot of money in the cryptocurrency world. Bitcoin is the biggest coin in the cryptocurrency world that gained a lot in couple of years , now etherium is in the road just like bitcoin did in the past years. Their value is for a long term invest and when they rise in price , a big gain in profits is at its peak.