The technique is called such because of its potential for reducing the average cost of shares bought. As the number of shares that can be bought for a fixed amount of money varies inversely with their price, DCA effectively leads to more shares being purchased when their price is low and fewer when they are expensive. As a result, DCA can lower the total average cost per share of the investment, giving the investor a lower overall cost for the shares purchased over time.[3] The alternate strategies are to purchase a fixed number of shares each time period, or to save up the funds that are available for investment and attempt to purchase shares at times when the market is low, i.e. market timing. A major advantage of DCA is its long-term investment horizon, a simplification which promotes fiscal discipline; given its clockwork like methods, constant decisions are unnecessary.
DCA is not just for the poor, it is an investment strategy that helps increase the value of your investment shares. If you want to maximize profit, DCA is the way to go. So far, it has been a very effective, proven investment strategy. Whether rich or poor, I feel this is the best way to go about BTC investment.
Of course, DCA strategy is not just for specific person, is a strategy that everyone can use whether rich or poor, regardless of your income level, is not that DCA guarantees you with highest profit, but it help anyone that invest through DCA to build their bitcoin position consistently without completely relying on market predictions.
For the investors who plan a long term investment to accumulate bitcoin for a long period of time, they free themselves from pressure of try to find or predict what the next entry will be. Whether someone investing $10 weekly or 100 monthly follow a DCA strategy with discretionary income will be a practical and sustainable approach. People who stay consistent and patient always succeed.