As long as you are not all-in, I think you haven't lost if there's only a price drop, as long as you still have the asset. What I do is analyze in more detail about the coin, if there is still a possibility to reverse direction, hold it and wait for the price to return to the price when buying. Unless you play on margin or futures, you must dare to cut loss, and this is where asset diversification is important because profits from other coins can minimize losses on coins that experience price drops. I personally have never All-in crypto assets in one coin. I always split the capital to play in a lot of coins.