generally we learn from our mistakes and try not to repeat them plus those who were already active in 2017 know how the market trend works, good traders manage to make gains in both directions of the market, we must not follow our own instinct and the various gurus of the market we just have to follow the charts and act coolly
Not all of those that are making mistakes learn from those. It's really hard to learn those mistakes if you're not willing to learn the lesson that you got from there.
Instead, you're making yourself work on that matter without realizing that you need to be calm at most times when you're in the market because such emotions will pull the trigger that shall make you lose more.
Acceptance is the key because if you do that then you would definitely learn from that and its true that not all would really be having that realization if they do just simply ignore or turn
their backs on the market and doesnt accept about their mistake that had done. Losing money is inevitable because there is no such thing about being a perfect investor or trader.
Thing here is that you should know on how to sustain yourself into the market in longer runs.Try out lots of methods and this would involved lots of trials and errors.
You should suppress the risk as minimal as possible.