Some days it just takes courage to take the profit. You can always invest back in when the time is right. Patience! Accumulated % of profits. If in for the long term ....don't look at the markets everyday as that will just absorb valuable energy and focus.
Making profit through trading is not easy because it has some rules and procedure that you must have to focus on for you want to make profit. Once you are done by getting knowledge of trading then you will find ways towards profit easily because it is all your knowledge which is helping you out in getting it. Buy coins on low price as it will consume low starting amount and later on after selling it you will have maximum profit.