Well buying at the dip and also investing in the DCA strategy accordingly can be combined but it kind of essential to understand the importance of each approach
If you buy the dip, you're already considered investing. So, whether you DCA or simply buy the dip, there is not a lot of difference and even can be said of the same thing.
I have never heard anything more wrong than this in this thread. Buying on dips and DCA is not the same thing. If you are buying on dips without any other consistent strategy, then you are basically trading and gambling with the market price on when to key and when not to. But when you DCA you are consistently buying Bitcoin into your portfolio without considering the market price.
So literally;
Only buying on dips = waiting on/timing the market = trading
DCA = consistent buying = investing
DCA and buying the dip if there is more discretionary income = consistent buying and taking advantage of the dip = investing.