yes I agree, stop loss is very helpful in minimizing losses
the method that I used to use stop loss is 20-40% of my purchase price and below the coin support point because the coin that falls past the support point will go down deeper, and if for long term for example the coin I buy goes up I will raising my stop loss little by little in line with the increase in the coin
note you must be 100% sure in installing stop loss because so there is no regret in that, because in some cases the price touches our stop loss and then the price bounces, some people may think I am losing even though the price goes up, such thinking will make we are hesitant to use stop loss because it believes 100% with the decision that you take to stop loss is a mandatory thing to support your mentality because sometimes you are saved from a big loss or failure in profit, so it's immediately decided then accept without regret