When the price is not good enough then you don't have to sell as no one forces you. But this is a market that we need to take advantage whenever we're in profit.
Don't make any decisions when there's no need to. I can't quite remember who said this but I've heard this before and this has a great impact in life. The same rule should be followed while investing. Setting a target and staying true to it is the key to becoming successful at any investment (Not guaranteed tho. Every investment carries risk). Set a target and work hard till the target is reached. Not only in crypto investment but in all investments.
When there are no significant profits to make, wait, and do nothing. When you don't have to make a decision, then why bother? That will only lead to emotional influence. And it investment, we don't want that. This is a great way to avoid getting emotional. We should all learn to do nothing when it is not needed to do anything.