I will definitely suggest you to use stop loss for most of the coins which you can't analyzed which will definitely help you and will prevent you from a big loss, i don't say that it will be 100% but at a certain level, which will be beneficial.
Definitely, stop loss is one of the very important things to set when we are doing trading, moreover, we are a daytrader, IMO.
This is because, especially in futures trading, we can manage how losses we can afford in the trading and it is better to end the loss on a small scale, then turn to another trading to get profits and cover the previous losses. Instead of we have to wait for the coin to rise again which we don't know when it's certainly, and this could make us more loss.
But, back to each trader strategy, sometimes some people don't like this stop loss and prefer to hold coins to rise again. This is more common in Spot Trading.