hunting good coins is how to make the loss look tiny and it is hard to do but it is good way to hunt coins and to invest in small price coin.
There is a difference between manage your losses and getting a profit. Because it seems you are getting confused with those two things.
and finally the most important thing is to never invest all the money you have, 20-25% of what you have maximum is what I suggest.
And how about if all of your coins are trash? Have you already thought that stuff?