Yes this will usually be the best strategy for a poor holder, as not everyone may be in favor of investing with accumulated money. So that person can regularly participate in bitcoin investment with small amount of money which is the best strategy for him. You notice that investing in the DCA method is much more likely to be a maximum long-term investment, because the price of Bitcoin is not always dumping and not always pumping. Therefore employing DCA method is maximum perfect according to Bitcoin price, and it controls the average price.
I think everyone will be able to use this method whether they have large wealth or not, but this strategy will be very useful for some people who want to accumulate Bitcoin gradually and can hold it in the long term, when we want to hold it in the long term of course we have to have good planning before collecting Bitcoin and it will be difficult for us to hold it in the long term if we don't have good planning before collecting it will certainly not be able to hold the assets we have.
What you say is very true, when we can invest regularly using the DCA method, of course this will be able to control the average purchase and this can certainly provide profits according to what we want.