According to us,investing in cryptocurrency is completely safe keeping one thing in mind that crypto must be legal in that nation where you are living and having your economy.Investing in crypto can give you good results after some time after all crypto is the future currency of the world.
No, even if they are legal in a country but still the word safe is not very suitable for bitcoin, they are not safe because if you read this whole thread then you will know the answer. here a lot of Scam, Fraud or even other frauds that can cause you to lose the assets you have.
other than that, people's habits are relatively real, some are trading, some are investing for a longer term. for profit here we cannot guess whether it will be profitable or not in a certain period of time because we are talking about volatility. this is far from safe but being in bitcoin is something that is quite worth it to do