but actually at this time we don't really need that feature because when the price goes down we just hold onto our coins and the price will go up again.
It depends on the strategy applied for a person's trading or investment. Because if you think about it, the stock exchange would not include useless features, therefore the stop loss and stop limit features are often used by traders, especially daily traders who monitor prices every day.
Currently the price of Bitcoin is experiencing a correction again, there are still many reasons to hodl, and I'm sure some people have set their stop loss at a certain level according to the loss tolerance they can bear.