I guess it's trading which is not for everyone and not the crypto investment because we have seen people getting fed up of reading and usually quit after losing it all but I haven't seen any investors saying these things because they know any Investment takes time to give returns or maybe the person you are referring here started investing under guidance of someone who promoted crypto as get rich quick scheme.
Cryptocurrency is risky and we should be careful at all times.nCrypto is not a get rich quick scheme, rather its always a top notch to smell interesting winnings and never backing down from the realization of making enormous profits. Crypto investment is exhausting? Really? Because if something is generating money for you, I see no reason why you should complain other than focusing on that particular project doing the necessary stands to prove one to be winning.