I don't apply this rule to Bitcoin because I firmly believe in its value, so I try to make it the last thing I sell while I'm alive. But when it comes to traditional markets, especially sector ETFs and another promising stock, my strategy is to do DCA during bear markets. When the bull market comes, I sell everything once I identify it's over and start buying again. I'm not looking for quick, massive profits; my strategy is to achieve consistent returns over the years. Over the last 10 years, I've been able to maintain an average return of 15% per year.