The reason for using the DCA method to invest bitcoin is not just about the price of bitcoin ( increase or decrease), the main aim for DCA method is for investors to be able to invest bitcoin easily without trying to save some money to buy bitcoin because this is even waste of time but the essence for DCA method is for investors to invest with the money they can afford. Some people do think to invest bitcoin you have to get some fine amount of money to invest but the DCA method have proved it wrong that people don't have to get plenty of money first before investing in Bitcoin.