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Personally, I prefer looking for discounts, and buy the DIP and HODL. I know that DIPs could go lower after the purchase sometimes, but having a discount is definitely better than no discount if you ask me. But for the topic, "Lump sum vs. DCA", I believe from a plebs perspective just do what you are comfortable doing, do what gives you the least stress/anxiety, and do what makes you happy. In fact, you can do both if you want to, no?
¯\_(ツ)_/¯
Lump Sum and DCA are fine to do regardless of which one they prefer the most. In fact both strategies will only be profitable if they are actually executed at the right time. DCA at any price is fine mainly because of their approach to accumulation, but Lump Sum on dip is also fine. In my opinion, both strategies are mutually beneficial rather than finding out which one is the best between the two, but of course this must be adjusted to market conditions and also the budget we have.