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Everyone learns slowly with time and mistakes similarly everyone invests in bad projects and then regrets later it happens to all of us and yes staying in eth is the best thing to do.
When an investor is interested in investing under the influence of others, he has a higher percentage chances of make losses. Because then he himself does not show much interest in doing research on that project, the main reason is from the idea of making more profit quickly. Just as a good project can give you a good profit, a bad project can put you at a huge loss.
So those who can't think of themselves as professional investors can't stay in the market for long.