I set my failure or loss by waiting for the price to go down and after that buy it again at the right moment or the right moment because the price will definitely go back up, and preferably trading do not use all the money there, you put money to overcome this loss.
This is really good because buying at low is best thing we do for our future, bitcoin will increase someday with price but people who lose the patience and sell at low price do bad for themselves, price is sure to increase so if you will sell at time of dump it is almost all lose, I use to hold and wait for the right time I use investment not the trading so the chance of lose is very low in my case trading does not charge high profit to the investors so investing and waiting is best option.