What I mean is that when you take bitcoin to become part of your life,you will know that you have to keep your coins with you till old age no matter what significant circumstances that befall bitcoin price,you wouldn't bother because you have seen it that it is part of your life.
But this isn't a big deal, man, and it shouldn't be to any Bitcoiner if the person truly knows more about Bitcoin before going into it. The thing to do (possibly for me; I don't know what others think) is just look back at the price history of Bitcoin and note the great price crash of Bitcoin, then they will relize that it has even crashed by -99% in 2011, but yet it recovered big time.
there will also be a time that you will use DCA method,the important thing is that make it your priority.
Every bitcoiner can use the DCA at any time they want, but it depends on the investor and how much they are investing. For instance, if the Bitcoin price drops to $20,000, I could just let go of DCA and buy up at once any amount I wish to buy because I am satisfied with the price dip, but perhaps, let's say, if it's trading at $40k, I can decide to do DCA because I am hoping that if I buy with DCA, there will be a chance that the price will go below $40k. Upon that, there are people that will still do DCA even if the price has dipped more. It might not go below that again, but some will still be waiting to DCA hoping that it will dip more, and after the price sees a big uptrend, that's when they start to regret why they did not just buy up at the point it was very low.