In fact, the DCA model will indeed prevent you from panic selling, but additional capital is also very necessary, otherwise how can we consistently accumulate every drop of BTC if we don't have sufficient funds as you mentioned above.
When you are focused on DCA, that will make you not think of any panic selling. Because your sole game is to just accumulate whenever you have money and you won't mind the price. And that's even going to give you that happy vibe when you see the prices go low because it's more Bitcoins for you.
I believe you were trying to say that when one is focused on DCA, it won't make the person panic and sell their Bitcoin. Yes, that is true. With DCA, an investor is free from thinking about the current prices of Bitcoin. No fear of volatility but peace and calmness in their strategy. You don't have to look at the price often unless there is an intention to sell. An investor who is Dcaing does not have the mindset of selling so soon. Its either he is holding for two or three years or a decades because I know that there are some who are holding for a very long time.