I agree with that waiting shouldn't be part of anyone who's interested investing in bitcoin as the price volatility doesn't guarantee anything to any one as per it might be on an upward trend but turn out to dip while one might be waiting for a dip it could become so bullish. I always encourage buying regularly (daily weekly and/or monthly) as much as you can within your disposal. Constant buying has proved to be the most appropriate thing one can do in his or her journey in bitcoin investment for instance MSTR ha been buying regardless of the price of bitcoin and it's evidence that bitcoin investment is mostly successful when one buys are all potential including the bullish period.
However buying the dips is not also a bad method of accumulation as long as you're doing it but regular buying (DCA) can be more productive as waiting for the dip might not occur in ones expected times so it's best to make every entry count.
In the course of accumulating bitcoin, of course we get many opportunities to buy when the price drops or drops stronger, the reason is because we buy routinely with DCA and it will change the path of everything, namely every time we drop we have the opportunity to buy.
The best opportunity is to have a reserve fund ready to be used to buy at a price when it drops. If that is possible we can add more load by acting a little more aggressively but all of that must have a plan in advance in managing cash flow to the form of reserves, emergency funds and funds that are ready to be used every week to buy bitcoin.
Accumulating bitcoin is quite easy, we only buy on a trusted exchange and withdraw to a personal wallet, we must have confidence and be consistent in investing in bitcoin.