Buy the dip, and HODL.
Buying the dips for me is not for everyone, all of us have different perspective on trading and holding. There are some people who want to hold their bitcoins for a long time but there are some who want to day trade it. Buying at dips is not working all the times and there is criteria for it.
People who buy bitcoin will be at a variety of stages in their life in terms of their asset accumulation, and there is no real argument about any other asset being better than bitcoin in terms of long term investment opportunities.
Of course, we know that past performance of bitcoin cannot ensure future results, but still there has been a lot of value in either dollar cost averaging and/or buying on dips.. Buying on dips is merely an attempt at a more advanced system of dollar cost averaging.
I personally would recommend that people striving to accumulate bitcoin do not fuck around with trading until they have already largely reached their various investment goals in more prudent ways.. Of course, if you happen to be a professional trader or you have some kind of solid system of trading, then that might be a particular practice that you employ, but trading surely should not be anything close to a recommendation for normies or the vast majority of people until they figure it out.. . in spite of the fact that trading is way easier in bitcoin than it might be in a lot of other asset classes, but the fact that it is way more available does not mean that it would be wise to do it unless either playing with a very small portion of BTC stash or having a decent amount of skills in that direction - whether professional or just skills that were learned by practicing with smaller amounts (and maybe working up.. if fitting)