i think you need see the coin you have. have potential growing up or not. because the price of coin you worry about its from many thing they become down. so you need see first if you see something wrong i suggest sell it and buy another coin.
well, losses and risk are always part of the business, you need to take a risk, you need to loose something in order to gain high. but not all of us was their losses is very big and others are small inly. so we need to manage the losses. so my suggestions about the manage the losses are the: you need to do observation, you need to do survey and out of all you need to research