In order not to end up in such a situation, you must follow the rule - Buy during a fall, and sell during a market growth. If you buy a cryptocurrency when the growth is already long, then perhaps a fall will begin. The market always begins to rise after growth, then growth again.
It is best to put a stop-loss so that if the decline begins, the profit is fixed and the coin does not go away in the long term
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This one of the best choice because once the price is going down we might accumulate more coins in the market. Most of the trader will fail to do this type of activity and this makes them hold the coin on a long term basis.