I agree a lot of negative emotions can easily come to us when we're not using money that we can afford to lose so we easily get panic when the price drop and we easily get panic when we miss the opportunity. It makes us can't think clearly about the next move that we should do. Controlling emotions will affect our trade results so it's better to have a positive emotion before we start to trade.
the mistake is why those people used the money to do it, it's clear they know it's money that can't be lost but keep using it, I think from the start the way it was done was wrong so the mind wasn't calm.