you can earn as much as you choose altcoin with fast growth rates, then buy and sell the right time
I am sure that each of us have an techniques to get more profit , have a different way and different thinking. but one of the common way to get more profit is to hold only. yes, in holding you can get more profit but it is depend on how you will hold your coin. maybe you can set an target price before and then, if the market is good and starting to rise up again. I am sure that you will get more profit.