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Greed: Greed has led a lot of people straight to rekt, like my story above would have told you, I couldn't resist the pull of greed even when I had doubled my funds.
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It's quite difficult to control this. Especially if there is an opportunity, surely the desire to get more profit will arise, even though the opportunity is small and has already benefited at hand. Human nature, we must really be able to control this, this will also make us easily affected by FOMO.