I believe that DCA method to accumulate Bitcoin is best suited for average and low income earners who doesn't have a lump sum to buy in dip and relax for as long as they want, probably in years. The price of 1 BTC can be a discouraging factor for those that can not afford it so the best strategy for them to accumulate and grow their bags is to choose a feasible method and their is no better way than through DCA.
I would say this is the only way for them to accumulate BTC when they don't have lump sum, well there are many ways that someone can make huge money in short term so they can convert their small capital to big one like investing on a random shitcoin and make 100x over night or maybe by winning a lottery but those all are just not gonna happen to everyone.
So as an average person who understands that bitcoin has the potential to grow but they don't have the risk tolerance of investing big then approach small steps is what the DCA is all about and in over the period of time they will be having an portfolio value that they never dreamt of before so no matter what keep accumulating coins.