Well day trading is always risky and not for the people with weak hearts. As it is highly volatile, your investment can vanish anytime or it could be doubled, who knows.
But for the people who invest their life savings in crypto, I have a advice: Don't go for trading, Don't imitate other person's trading skill. Have some knowledge before you can invest and always go for medium to long term approach and it will surely give you great returns in the end.