I believe that DCA got even more popular this year because people starting to get that the bear persists to continue so instead of their usual strategy which is to all in, they try this new start called DCA and slowly accumulate after each decline.
DCA gets popular when the price is plummeting because it is one of the best strategies to lower the price of our investment especially when we get in at a higher market price. Usually, those who DCA keep on holding their previously bought coins and just accumulate when the price plummets.
This is the right thing to do, another problem of the DCA strategy is that it is going to take a lot of time before you see positive results, and this is unbearable for the people of today that want everything to be handed to them right now, so DCA is not really a popular strategy with those which lack patience as they think it is too slow, but if you can keep buying a little bit of bitcoin every single month you will see that when the bull run finally comes you will have a decent stash and your profits will be very high.
Waiting for a longer time and knowing that doing that will yield a higher return is not unbearable to anyone. Those who don't have patience are people who lack knowledge about the market and since they lack knowledge, they do not find any valid reason why they need to have patience.