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justin sun is actually someone who looks very childish and uses a lot of fake and superficial news to make the coin grow up without needing and then people lose the trust and respect

of course it's very risky. if the asset that you invest is profitable it will become extraordinary, but if there is a loss your money will be lost all. You should divide your money into several assets to reduce such large losses. share your money on a number of assets, it will be safer for you.

then is there a good solution in your opinion for the problem of mining with the cpu at this time, is there any coin that can benefit according to your experience?

I concur, without risks you will never know the value of it. You need to stress yourself before you can know the value of it 

I think in this case you are experiencing bad luck because you are not smart at selecting the airdrop that is worth following, because the percentage you mentioned is a hoax. the proof of every airdrop that I follow is not all scam, and I can feel the results of being an airdrop participant, though sometimes the results are very low.