Since BTC is volatile and it is not possible to accurately time the bottom or the top, dca is a great way to accumulate BTC and even if you wanna buy in lump sums, just do so when you want to. If you keep waiting for the perfect time, it would never come and you would never buy. And then you'll not stop singing: 'oh i should have bought at x time.'
However, as you buy, don't be like weak hands that sell immediately there is fud and start to fomo buy when the price starts to rise again; you surely don't want to be in that position.
Strategically buying through DCA never needs to have anything related to price because buying is happening through strategy, and the holder is having accumulation, which is going to help him in the long run, while people who are in this for a long time also love keeping things on their way with keeping an eye on price movement because they feel it's the best thing to do, and this always helps them.
I started with DCA and am still having things on my way for the long run, but I also did some buying at this price because I feel this is a golden chance, and never dropping this suddenly, having an increase of $3000, gives a good boost to my buying. Even though I am not a small profit taker, keeping things in balance is also important for me.