You just have to understand the market, you need to be able to study and know when it’s a right time for you to invest and withdraw your crypto currency. And also remember only invest money you know you can make back even if you lose the money.
Investment is not only seen in terms of market movements, investment instruments are also needed to produce good value, In determining the choice of the type of crypto you want to invest in, the main factor you need to pay attention to, so you don't bury your money in dead crypto types.
Basically people know investments where people want to buy and sell, as far as I know the crypto market is always viral when these two factors occur and the short and long term methods people also know about it, consider the type of digital currency the main thing.