Stable coins are very helpful in trading on the market, without them the market would be quite different, personally for me stable coins are an indispensable thing in trading.
The stable coin can help you to save your money from the volatility, and if you are afraid of that, you can sell your coins to the stable coin and hold it for a while. And if you see that the coin is down deeper, you can have a chance to buy the coins so you can make a profit in bitcoin. I think stable coin can be a solution for traders who don't want to see the fluctuating of their coins.