DCA is a sound investment strategy for those with relatively less experience, insufficient funds, reduced investment risk, etc.
The DCA strategy is not mainly for the poor or people with insufficient funds; the DCA strategy is for both the poor and rich guys. Anyone who uses the DCA strategy to accumulate bitcoin wants to be free from waiting for the bitcoin price to reduce to a certain extent before he or she can buy bitcoin. With the DCA strategy, you can accumulate bitcoin anytime you want to buy it without worrying about whether it is the right time to buy it or not.
While that just the truth, whether you are rich or poor as you said. You can exercise DCA strategies. Because as for someone who is financially stable, during the dip he or she can decide to purchase a large quantity of bitcoin and hold and at same time use DCA to keep on accumulating in different price interval. And while yah financially stable with alot of funds to invest and same time have a huge nice emergency funds Such DCA would be more effective and efficient. For instance you can't compare someone whose DCA price is in the price range of $500 to that whose is $50 weekly or monthly.
While some base on that their financial stability, they won't be able to purchase a large quantity of bitcoin so they would prefer using DCA strategies to keep accumulating a certain quantity of bitcoin till they eventually endup building a mature and nice portfolio. So DCA strategies is open for anyone who are ready to invest and accumulate more bitcoin in Their portfolio (mostly for long-term investment)