Experience is the best teacher and we wont really learn up something if we don't experience those mistakes.It isn't necessary because its always a inevitable thing to happen.
We don't know on what would happen ahead and we don't able to make out decisions based up on our own presumptions sometimes it can neither be right or wrong.
When we do make out presumptions its a 50% chance that it could be right or wrong.
That 's what I always say, especially if you didn't lose money, but lost on profit, that is one of the cheapest lessons you could ever have. Think about it, you earn 10 instead of 50 and you have learned a lesson at the same time. I know that people prefer the money in their hands than a lesson and I get that, it makes sense, who would need a lesson when they could have thousands of dollars in profit.
However the reality is that we are doing much better in the long run when we get these type of lessons. Which is why I think it is quite obvious we should be focusing on something that would worth money in the end and not money right now. This might result with you earning 100+ later and 10 now instead of 50 now, and that is the lesson here. But I also do understand people who still get upset anyway, as long as they learn their lesson that means being upset about it still can be understandable.