With DCA, you set an amount that you can buy no matter what.. based your cashflow, not based on the price of BTC. Accordingly, there is a presumption that in the long run that BTC prices are going to be up higher than your DCA amount... especially if you have a 4-10 year time horizon or longer.
Of the many long-winded discussions related to DCA, for me the sentences in bold are clear, straightforward, simple, easy to understand and beginners will easily interpret DCA as a whole. Buy regularly, and whatever the current Bitcoin price is. Then we will look at the various advantages of each calculation. And you explained it very clearly.

Bitcoin is unquestionable for the DCA method, apart from being tested, with DCA never hearing of anyone losing Bitcoin.
Regarding your last sentence, so far in bitcoin's history, it would have been difficult to lose money if you are ONLY DCAing and you had been in bitcoin for 4-10 years or longer... however, we should attempt to caveat such a statement in a couple of ways, such as understanding that even within the employment of DCA there can be various ways to carry it out in terms of either front loading the investment by investing larger amounts in earlier stages, or maintaining some flat amount and then supplementing it from time to time with further buys on dip.. or maybe by increasing the DCA amounts as income levels (cashflow goes up and/or other expenses go down), so if there had been some dramatic changes in cashflow in recent times, then for sure someone could be in the hole in terms of whether they are in profits or not, even if they had been DCAing for a while (even more than 4 years)..
Another issue remains that past performance does not guarantee future results, and even if any of us might have come to an assessment that bitcoin is amongst the best of investments to hedge or to supplement or to aggressively allocate, we might end up being wrong in the short term, medium term and/or long term. We do our best in terms of figuring out our strategy and our allocations into bitcoin based on the information that we have and as new information might come in, and so in that regard, we can attempt to be aggressive in our investment into bitcoin, but not necessarily be so aggressive that we end up getting stressed out if our investment into bitcoin might not be performing as well as we had anticipated it to perform.
I noticed that the more the people are buying cryptocurrency is the more the increment cryptocurrency is going up so I believe that we need more investors to come into cryptocurrency so that the price of Bitcoin will rise. I believe that cryptocurrency need more of buyers to bring it up again and also attract more people
Hopefully you are not so distracted as to be investing into shitcoins.
In other words, who gives any shits about "cryptocurrencies"? Seems like a big distraction and gambling event to me if you are having to use the term "cryptocurrency" 4 times in your above post and you only use the term bitcoin once...
At the same time, I hardly even know what you mean when you use such term "cryptocurrency," and I doubt that it even matters very much if you think that there is such a thing that is worthy of being discussed with such vagueness and without pointing a wee bit moar better to what you are referring.