So, I think it is most reasonable to take a decision like Person B instead of saving money to buy aggressively. But if someone takes the decision of Person B, then the thing that he has to keep an eye on is whether he will be able to repay the loan or not and whether there will be any kind of problem in his continuous DCA method, etc. He will have to take a decision after considering all the factors.
I don't support borrowing to invest in Bitcoin or any assets at all, my philosophy is if you can't afford it then don't invest in it. Yeah I see the billionaire do it (borrow to invest) but those guys are in another world all together and they have different sources to get the loan repayment back but you, if your source of income goes. What's there that you can use to repay the loan eh? Exactly, that's why you should only invest what you can afford and what's with this aggressive language, investing doesn't have to be aggressive or a do or die affair when you can just softly invest what you have when you do and it must not be every time, you can miss a month or few when there are emergency expenses and it must not necessary be when the market is down that you invest, you can do that anytime.
Absolutely DCA is not a do or die strategy, most people do think that they just have to keep up with buying every week or monthly too even when there be an emergency that is going to affect their finances which can end up to create unnecessary pressure.
Personally for me the purpose of DCA it to make investment more manageable not in another way round to force you to buy at all costs. If in a case you aren’t stable stable at that moment, skipping or reducing ur purchase for the main time it more better than for you borrowing money or investing in money that might need to solve some important things later on. No one pressure, you can still continue when things fall in place for 💯.