This method is especially useful for those who cannot afford to buy a large amount of bitcoins at once but are willing to invest in bitcoins. Only they can invest in this method and buy bitcoins in small amounts and hold it according to their specific goals.
I cannot completely agree with you. Because, as far as I know DCA method works for everyone and all types of people can invest in this method. DCA method is considered as ideal investment method for small scale or large scale investment. DCA approach reduces the risk of loss in the long run.