DCA is a good strategy for long-term investment, not short-term speculation with kind of gambling mode. I agree with your about efficiency of DCA strategy for long-term investment but disagree with you that there is no risk with Bitcoin investment.

It's right to say if you can hodl your bitcoin a long time like 4 years or 8 years, you will increase your chance of getting profit or very good profit but there is risk, not zero risk.
https://www.bitcoinmagazinepro.com/charts/bitcoin-profitable-days/
https://hodl.camp/

The HODL campaign suggests Bitcoin investors HODLing their bitcoin for 5-years+ to get profit.
The Bitcoin profitable days chart shows 97.% of Holding time is profitable and it's very likely that you can get profit by holding your bitcoin with a condition is holding a long time.

You lose your bitcoin if you do following things

Sell your bitcoin.
Lose your bitcoin by losing your wallet or your wallet was hacked and your bitcoin was stolen.

You only can keep your bitcoin untouched by holding it safely in your non custodial, open source and best hardware wallet. Make sure having usable wallet backups for recovery in future if needed.

Simply holding your bitcoin is not enough, you must hold your bitcoin properly.
How to backup a seed phrase?

Holding your bitcoin on online platforms is not good way to holding it safely.
Reminder: do not keep your money in online accounts

Buying dip is good but still if there is a bearish season than you can avoid. I will say always DCA is good to know and also your financial conditions too. Be cautious by the way.

Of course a lot is being expected to whatever source of resources being invested and that's why it's being so optimistic for investors invested on bitcoin that it good days will always come somewhere in the future. That's literally a confident trusted of what bitcoin is potential of.
If we're to talk about loosing our funds invested on bitcoin based of market performance in a long term, if say it's impossible rather the possibilities of lost is when we ain't patient enough to hold on that's if we've to exempt the threats of regulations and online scamming threats but basically lookout to the potential value of bitcoin and it market derivations.
Buying at the dip is worth opportunity to your value to standout in more better position during the market up trends but perhaps it's not mean that with all the promises surrounded about bitcoin that it's worth pouring all of our hope in there regardless that that it's risk less since it's a structural hedge of values that's volatile and unpredictable of what it'd outcome in a short or long term. We enthusiasts just keep being expectants.

If the financial ability that is owned is good then in a time frame like now it is the right choice to accumulate because the availability of opportunities that exist can be utilized by anyone to achieve a much more maximum investment.
But the problem is not everyone has spare money that can make purchases at any time so in market conditions like now it will make them do nothing.

This should be an opportunity to accumulate because the decline that occurred was at a fairly low level.
If you have spare money then this is the best opportunity to make a profit after the market moves back to the previous price.

Of course, it is very important to pay attention to the source of funds that we will use to add to the assets that we have collected because if we use funds that are not ready to hold for a long period of time, it could be that we have to take the funds back because we need them, of course we have to bear the losses due to our own mistakes.

It is true that a moment like this will be a good opportunity to add to the assets that we have collected and will be very profitable when the price returns, but not everyone will be able to take advantage of the memo because they do not have spare funds and as Bitcoin fans, of course, continue to maintain their assets if they have not had the opportunity to add to their assets.

Brother, your analysis and decision are certainly commendable, especially those who were able to enter at lower prices are now much ahead. But one thing is certain that not everyone can read charts like you or reach that level of confidence.

Although DCA is not a perfect method, it is a safe option for beginners, because it reduces risk and even if you miss the timing of the market, a position is created at an average price. You can this of it for compromise your risk level. Many people stay away from the market if they always think “I will enter at the bottom.”

As you said, now is not the time to accumulate, that is right from the trader’s perspective. But for long term investor there's still a lot off open space for them to accumulate ,especially those who are investing little by little. Because even if you cannot always catch the bottom, if the market is in an uptrend, then you can still make good profits with DCA.

Finally, I will say that what you are doing is working for you, great! But not everyone’s skill level is the same, so the strategy will not be the same. 

That's why the ability to manage financial resources is needed because in living life, it's not just about investment.
If someone does not prepare reserve funds for other needs, the investment will not go well because under certain conditions when we need money, we have to sell some of the assets we have.
If market conditions are in decline, we will experience losses when selling these assets to meet our living needs.

Untouched funds can be used to buy in larger quantities when the price drops and that is an opportunity to accumulate bitcoins in much larger quantities.

While you also think buying at the dip is not encouraging for Short term investment, note that while you awaits to make count of  profits in the short term, it does not come so quickly so, while holding on that short patient for the market to increase but then, it has been experiencing the dip, it is still worth buying at that dip and keep to your patient holding. That is an added opportunity for you because as you increases your portfolio at that dip time, so also your profit will increase when the market price increases.