That is the point, not everyone has the capacity to go all in at once, and that is fine.. That is why DCA fits almost everyone financial level. You don’t need to have a huge lump sum, just consistency and patience. Even with small amounts, if you keep stacking but by bit, it compounds to something big. Those waiting for a perfect dip usually end up missing out because the market would not always move how they expect.
But with DCA, you stay active, you build your bag gradually, and in the long run, it pays off way more than sitting and waiting for the right moment that may never come..

Why would an investor go all in at once in the first place?
Anyone that goes all in on his bitcoin investment is seating on a time bomb that may explode on him anytime soon, so it should be discouraged by all means.
You are right mate, waiting for the dip before buying is not good because your stash of bitcoin will be stagnant all this while your are waiting for a dip that may never come, since no one knows what the the market might do next.
What most Bitcoin investors are adviced to do is to keep on buying regularly then if their is a dip in the market, he may choose to buy aggressively then, only if he has a reserve funds in place to carry it out.

The DCA method is meant for everybody regardless of your social status, if you are very wealthy, you can still DCA with sizeable lot size, this is so that you can be investing with caution and not necessarily because you have the money to singlehandedly buy, that's like throwing caution to the wings, as you are supposed to invest with your discretionary income on a gradual level. "what is good for the goose is also good for the gander", what you think is good for the average income earner, is also good for the rich too.

If you want to invest in Bitcoin, you don't need to worry about whether the price is high or low. Even if the price is high and you think it is not the best time for you to start investing, you are just missing opportunities and wasting time, which you can never recover. You can buy Bitcoin anytime, irrespective of what the price is in the market. The reason you don't need to wait for the price to come down is that there is no guarantee the price will fall, and if it doesn't, you will be at a loss by wasting time. The price of Bitcoin might have gone up, and you may think buying is too expensive for you. If you had invested earlier, you would have already achieved an inrease in your investment. Buying low or high is always advantageous; there is no need to keep waiting

Ya waiting for a particular price is not guarantee that the price you're waiting for before you can buy bitcoin may not come and even if it come you might have wasted some buying opportunity, so it will good you get started with your investment if what is your discretionary income is available, if you think bitcoin is costly now you can buy in small group using the DCA strategy without waiting to buy when the price is low or high you as are buying at any price either weeks or months when you have your discretionary income available.

Who can guarantee that the expected price will be achieved, because waiting too long will likely result in missing the opportunity to buy Bitcoin at a lower price. Be a smart investor by taking advantage of Bitcoin price volatility with the DCA strategy. Buying a certain amount of Bitcoin regularly can help you reduce risk and increase long-term profit potential.

Instead of waiting, it's better to start investing regularly now to help you take advantage of the surge in accumulation to achieve your investment goals as expected. So, if you have some spare cash lying around that isn't being used for other purposes or a steady stream of discretionary income, start your Bitcoin-collecting journey now, instead of waiting for a specific price.

I don’t know if you know this?, investing in bitcoin is a choice not a death sentence, and there are three strategies to investing in bitcoin and one of them is lump sum. Just like Grace said not everyone has the same financial capacity and individuals invest with what strategy is convenient for them. DCA might be the best strategy by many standards but there are some situations where the other methods can be used.
Imagine telling Michael Saylor and other whales to stop lump suming that they’re sitting on a time bomb, that makes no sense at all. Use the strategy that suits your financial strength  and leave the other to his. Michael Saylor’s Strategy I think employs both lump sum and DCA.

Because there are those rare situations when it's "the right time". I personally believe that one of those rare occasions is when Bitcoin touches, or goes below, its 200-Weekly SMA line.

That happens during bear markets when Bitcoin's price movement is weak. That's definitely why during phases of euphoria, don't FOMO, and actually start saving for that next opportunity.

Yes, it is true that the current market price of Bitcoin has decreased slightly and it is much less than its possible future value. But you have to consider that Bitcoin's journey started only 15 years ago and the amount of credibility and acceptance that Bitcoin has gained in these 15 years despite being a crypto currency is truly commendable. No valuable object or asset in the world has reached a stable or high level at once, it certainly takes a long time. The acceptance of something depends on its demand, use and investment. Thinking from there, you can definitely consider Bitcoin as an investable medium. But considering the current market, since the price of Bitcoin fluctuates a lot, you have to be careful while investing here. For this, you can adopt the DCA method. In this method, you do not need to invest a large amount of money at once. You can invest here from your remaining money after fulfilling all your family's needs. This will reduce your financial risk and you will be free from worries.

 One thing to keep in mind here is that since the market price of Bitcoin is not stable, you cannot rely solely on it to make a profit. If you want to be a successful investor, you will definitely need a stable source of income initially so that you do not suffer financial losses if the market price decreases. Those who think that the price of Bitcoin will decrease further are wrong. If you look at all the overall aspects such as acceptance, demand and usage, you will see that despite this unstable market price, it will continue to increase gradually and fluctuate within a certain range and at some point its price will reach a stable level.