So everyone lost some money, and he still claims he got experience

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Let's talk about money, few people got so much of them that they can't even spent in their entire life and those people will do such things with the money, they don't be afraid to lose when those came in to a platter for them. While the one who earned that money from scratch and became a billionaire will still care for the money they lose, it has to be something useful for them which shows the drastic character and why most people who manifest about money can't make it while few are destined to reach it.
I honestly don't know what to make of this story other than saying don't be a stupid as they are.
But many of them for example one person who invested 1mil into shitcoins was the real estate developer.
And kind of educated, so can you really say in general sense was she stupid?
I think she wasn't stupid in general sense.
You are missing what @Findingnemo is trying to let you no because he is telling you nothing but the fact, he wasn't saying the person you are referring to which lost that so much amount is stupid but he is actually saying that nobody willingly give up such funds with the intention of losing it, it doesn't happen, there must be sad emotion after that, actually if it was a story you read they have actually forgetting the part of how the person felt about it later on, however you said the person was a developer which means he is still working to get paid or from people buying his products, so in other words he is looking for money so definitely is a losing he will never forget all his life.