I cannot agree more with you. I almost read every topic of yours, and they are really refreshing for me. I also did a search on these topics when I was new to the crypto field, but your way of memorizing those topics by writing them down here is better. It will enhance your and other newbies' knowledge.
DCA is really a great strategy. I have done it; I receive some amount in my wallet every week, and that's my time interval for DCA, and so far, what I do is withdraw some amount from these weekly earnings to meet my personal expenses. And the savings I left with are already in BTC. So I can say that I am doing DCA on a weekly basis, with no fixed amount of money, as it changes according to my needs.
So far, the results of doing DCA have been very good for me, and I am really looking for the halving event because it might give me 2x or 3x. That's the least I was expecting. I hope everything will go as planned for all of us. Well, the point is, DCA is helpful, but for those who have weekly or monthly earnings and don't have a pile of money, they don't have the choice to go for lump-sum while all they can do is just DCA. And in my situation, I can only do DCA, as I don't have enough funds to do Lump-Sum.
On the other hand, Lump-sum investment can be useful and maybe not. As i aforementioned that we can't time the market. So, what will happen using this strategy for BTCBTC accumulation? The person will buy Bitcoin at higher price or maybe at lower price with full of his investment at the same time.
I won't say that they invest all of there funds, because the best practice is to keep some funds for emergency. Either you are doing DCA or lump sum.