$ENA seems to be a very good way to earn daily money by its fluctuated surging diagram.
Keep one thing in your mind, you will never sell at the peak price, especially when you aren't expert, So take profit when you feel it's fair or you even if later went to higher price, it's better than regretting not collecting your profit As it will go down again.
Basically as long the price went bellow than your selling price then you are in right place to sell, if you think it will go bellow your last selling price even after one week then you should sell immediately.
If you keep holding your assets always, you will not make more than double amount if it went from 1$ to 2$ even if it took one month. On the other hand if you keep selling and buying in fluctuated currency you can do more because it will never keep going up without going down
♦Buy in price less than the price you sold earlier = profit
Whatever the new price is.