Stop loss is very important in trading because that feature will be reduce the loss and to minimize the risk. And percentase of stop loss should be less than take profit, for example stop loss 20% and take profit 35%. Stop loss very important in crypto trading because fluktuasion of crypto so high.
At the same time 20% move in a cryptocurrency price is not unusual and almost guarantees that your stop loss will be hit. Yes however it does limit your losses to the stop loss level.