Using the DCA strategy is quite good and it is for future investments, but there is no harm in using spare money to buy more when the Bitcoin price drops, that is an addition we do to expand the portfolio more. Besides, the DCA strategy that we have planned from the beginning must still be implemented consistently, doing some other things to improve I think there is no harm.
Having a separate money which you have plans to use in accumulating bitcoin when the price is down isn’t bad, but waiting for bitcoin price to drop before you invest is really bad, if you are waiting for bitcoin price to drop before you will invest, then that means you might end up not investing, because the more bitcoin price keeps on dropping, the more you going to keep on waiting for bitcoin price to drop more. If you really want to invest in bitcoin, then make use of DCA strategy, you can decide to buy a certain amount of bitcoin within a certain period of time, and whenever their is deep, you can still take advantage of that to buy bitcoin at cheaper price.