Well, if you think that buying at a dip is trading, then I suggest you get involved properly in trading for a while and come back to investment after, so that you can be able to differentiate between trading and investment by buying Bitcoin during the dip or making use of DCA strategies.
Well I don't know the quite you're replying too but let me recap my statement for better understanding...
Buying the dip is not related to trading at all because there could be other dip in markets under trading and normally a trader is meant to sell to make profit when there're dip in markets...
However, coming to the world of BTC buying the DIP is a good strategy for buying more BTC with lesser funds although this same strategy could be used by traders too since btc has always been in an uptrend buying a dip with strong capital could be a choice but most trader wouldn't want to risk that...
What I'm I trying to prove

For me I see buying only when the market is DIP as trading.
This statement is wrong IMO .... but the strategy is not a suitable strategy for beginners when we add emphasize on the word
ONLY.