You need to know first what is DCA? By DCA we usually mean Dollar Cost Averaging. It is an effective method for investment. Dollar Cost Averaging can basically be used by all types of investors. That is, if you invest following this method, you do not need to invest a large amount of money at once, rather the main purpose of this method is to invest gradually and consistently. Suppose you are earning $300 every month, after deducting all expenses from this $300, you will have a part of the amount left so that you can invest every month or every week and that should be done consistently. This is basically the DCA investment strategy. By following the DCA investment strategy, a rich person is currently able to maintain the continuity of investment, just as a low-income person is also able to maintain this continuity of investment, which is why this investment strategy is known as an effective investment strategy.