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Disadvantages;
* it can be time consuming
* the losses are irreversible
being in cryptocurrency (as a trader - developer or otherwise) is not time-consuming, rather cryptocurrencies open up new opportunities for anyone. besides that losses anywhere (not only in cryptocurrency) are things that cannot be irreversible, so what you say here is not correct.
* it prone to scammers
scammers are not only in cryptocurrency, scammers have been in this world for a long time even long before cryptocurrency, it was just the trick - the era and also the targets were different.
* its discouraged seeking further career
* it can cause shocks and death
discouraged seeking a further career? If you've heard the story of CZ (founder of Binance) then you wouldn't have thought he'd come this far and so far I have never heard of someone who died or committed suicide because of cryptocurrency but because of bank loans (non-payment of debt) I have heard a lot.