DCA is buying bitcoin regularly regardless of its price. You buy when it’s high priced, you buy when it’s low. So you accumulate bitcoin to grow your portfolio. But if you mean to say buying at its deepest price, that is buying at its dips, not a DCA strategy.
For now, I don’t DCA yet since my budget is tight. But maybe in the next couple of days, I will be DCAing again even if it means buying at its peak price, that’s DCA to be exact.