When/if the next cycle comes, sure, right now I don't see why the price should rise in the near future. Pretty much anyone who would be potentially interested in Bitcoin has already heard of it, or bought some, and I don't think the fundamentals are there for a higher moon until at least the lightning network is more usable, or when we start getting closer to the next Bitcoin block halving about a year from now.

Always buying at the considered dip requires extra ammos. This will be tough for an average bitcoiner.

What makes people refrain from doing buying action during every dip is confusion and doubt. Analyzing the current trend is one of the recipes in making a speculation which will result on next strategy. At most of the cases, if we say today is downtrend, it will be the case that will lasts for long period. But sometimes, people doesn't think of other way around that even how powerful a trend is, it can be reversed anytime.

So what to do now? Trust your judgement if it was properly analyzed. After all, if the purpose is really to HODL for long, people can considered every price level as dipping level*.

In the short term I've been buying whenever large numbers of liquidations start happening on Bitmex using the site aggr.trade (click for link), which provides a sub 1-minute chart showing big buys and sells, as well as liquidations, and I've been able to buy local bottoms with pretty good accuracy recently.

It's definitely not too late to buy in considering we may very well still be in a bear market, and you'll have time to buy once we break above $6k and when we're more clearly out of the bear market. We could easily be back down to the $4000s with a big red candle in the next few days, still in unclear territory right now.

Buying the dip requires selling, right? so let's say you sell for a profit, then it goes down a bit then moves past your original sell point then you panic buy back in breaking even or worse - what's the fucking point here? Only trade big moves or accumulate if you are a believer. If you aren't a believer, gtfo because this market will drive you to madness.

Believer to me = someone who sees bitcoin just getting more and more popular and expensive for the rest of their lives. In other words, a lasting asset.
Nonbelievers are the ones who have lost their asses, treating bitcoin like it's a gamble that could go to zero. When bitcoin crosses $20k all believers to that date will be in the black. Nonbelievers will be anywhere between up huge in fiat and totally busted.

So far, bitcoin has taken care of all believers in time, nonbelievers are the ones who get run over. Trusting that this will continue is what makes one a believer.

That feels.
I recently saw someone posted that with price $100,000 - $1,000,000 and 'still waiting for the dip'. They can wait as long as they want and for us who already have it and bought during the dip, we're just waiting for it to skyrocket again. We're all prepared and whenever I have spare cash, no need to buy some useless things instead I'm buying bitcoin during the dips.

Buy every dip is kind of suicide, but technically you have to analyse every market moves first before you buy anything even if your intentions is the keep your coins for longterm. These strategy don’t always work and most us are aware of that, trading is a decision game I should say.

  Every dip is an opportunity for every investors, but it all depend how was the situation affect your deliberation to acquire enough profits. It is too risky to decide, but we have to take the risk if we are aiming to earn enormous profits. Don't be doubtful for every decision you have take, it is about a strategy you created, if you want to earn then spend time to keep holding and if you are doubtful then do not invest, it may frustrate you and lose you as well.

if you are looking for the absolute bottom of the dip then don't look because you will never find it except for pure luck! what you can do however is to place multiple buy orders in a range of prices which you think can be good candidates for being the "bottom". for example when price was going down in $3k area you could have placed orders at $3500, $3400, $3100, $3000, $2900 and get half of them filled.
how big an order in each price level depends on how big a chance you speculate it has of being reached and how big a risk you want to take.

Another type of strategy where knowledge still needed to performed well, this is very useful from skilled traders who can trust the assets that they are supporting with, they simply keep adjusting each fall the market brings them, accumulating and never to doubt the coin that they are surely investing
with, its about how you know deeply the project and how you expect the performance after some time of waiting.