Buying the dip has its advantages just like the DCA method and most preferred by those who may not have the discipline to following regularly buying methods like DCA. Other people who will also chose buying the dip are those who may not have the chance to be checking the market regularly, instead they could just set limit orders at lower prices and continue their other activities.
People who don't have time to be doing regular buy by following the DCA method, or don't have time to be monitoring the market, should just use their money and buy at once in the form of lump sum buy. That is as much as their money can get them. If they since they can't be monitoring the market and don't even know when the market will dip. So setting up a buy order at a particular price they consider as dip might stay longer without any certainty of the order being filled or executed. So if their order is not executed they can't count themselves as hodlers of bitcoin. So for me I think that's a bad strategy of setting up a buy order at a particular price you consider dip without any assurance it will get filled or how long it might take. It could even take years without execution.