I find that many people have a habit of holding ETH, BTC, altcoin for a long time and always hoping that it will rise again. If you are a trader, you will lose money for that. Set small target and sell them when you see profits. I only need 3-5% profit when trading.
If you see the market going down, stop loss before it's too late. You may lose 5-10% of the capital but when the market goes down you can buy more btc, eth when you hold btc, eth, altcoin.
Sell all ETH, BTC into Stable Coin when the market goes down
Everything you wrote is about cut losses. Of course, escaping with capital to a stable coin is a solution, but not in every situation.
I think that in situation that happened today (with price drops), such an escape to stable coin is not the best way out of the situation, because at any moment the price can jump up very hard, and if we stay with the capitalis in the stable coin, we lose the opportunity to recover losses.