Most of this guy's that wait for the dip before buying thinks it's the best way to maximize profit because most of them has this mindset of buying low and selling high, so they wait for the market to dip before buying, not knowing that it's the wrong approach to Bitcoin investment, a Bitcoin investor that is only thinking long term should be buying anytime his discretionary income is available irrespective of it current price, because in the future this current price would be a bargain comparing to how high the value of Bitcoin might has rise up to.
I believe people who are waiting to buy the dip are short term investors (more like traders) who are only after profit so they believe buying cheap and selling after a little price movement is the best way.
You can wait to buy at the dip if you have reached your bitcoin accumulation target and wants to go into over accumulation stage. Also, when you are in your over accumulation stage, you can buy bitcoin at the dip in order to replace any quantity that you sold for a good reason and buy back when the price dips so that you don't go below your over accumulation stage and start accumulating bitcoin again with DCA regularly.
A new investor who is a no coiner or a low coiner shouldn't wait for the dip because it will make him end up with very little bitcoin in the long run at a cheaper rate which shouldn't be our primary obligation. Your priority is for you to accumulate as many bitcoin as possible for 4-10 years and above for the future. This is why DCA method is very effective and efficient because it gives you the space to buy bitcoin regularly, weekly, consistently and persistently overtime irrespective of the price of bitcoin. Anyone that keeps his bitcoin journey ongoing will definitely buy bitcoin when the price dips, so why waiting for the dip.