And how does DCA help? When the price dipped, you should buy more while you can, and putting $100 every week is the opposite of it, if the bull run will peak at 2-3 times higher price than now, that would still be a small gain.

If someone sits on a large BTC investment, they don't necessary have to buy even more now, it only applies to those who missed the bear market and now are looking for their last chance to buy for the current bull run.