These are different strategies in accumulating Bitcoin. Some investors use DCA strategy, others prefer buying the DIP strategy, while some DCA and also reserves funds to also buy during the DIP and some accumulate with lump-sum (Rich folks). All these approach are decisions made individually with what suits our bitcoin investment goals. Of all the strategies waiting to buy bitcoin during DIP alone without applying DCA strategy might slow your bitcoin investment growth because the price might not DIP to your desired levels and timing the market can be stressful. So why wait for the price to dip when you can be accumulating bitcoin through DCAing consistently to ensure steady accumulation, peradventure if it DIPs to your desired amount and you have extra bucks to buy fine but if it does not your accumulation through DCA continues to progress. DCAing can be done alone regardless of market fluctuations as long you keep it consistent but I don't see any need to wait for the DIP alone to accumulate bitcoin rather combining DCA with buy during DIPs can further enhance portfolio growth by taking advantage of lower prices when they occur.