you only have to adjust the right time, make the target so as not to be swayed, indeed we must go with the flow, but if you take too long to be washed away, that is why you have to make a target when you will rise to the surface after a long dive.
Based on my personal experience, I did a lot of mistakes in the past since I got greedy thinking BTC will continue to moon, one good example was what happen last year 2017 when btc had its ATH, I thought when BTC reaches to $19k, it will still go uptrend, but I was wrong, I was even hesitant to sell when I see it going dump abruptly because I trust BTC so hard without realizing correction should happen anytime.
Hopefully for newbies, they will continue to study and learn from the mistakes of others so it will not cost them money.
not only those of you who have such thoughts when the price of bitcoin has gone up in 2017, of course many people expect growth to continue. even more so for beginners they feel confident that bitcoin will continue to increase at that time, because the knowledge possessed by beginners is limited so they dare to buy bitcoin when market trends increase, it is because they are too greedy to expect to get quick profits in a short time, but at finally the market price dropped dramatically again. therefore, experience is the most valuable teacher, even learning from the mistakes of others can also be valuable if we are smart to learn them.