DCA is a buying strategy, it doesn't care about short term dump and pump, you keep accumulating no matter what the current price is, it is most suitable for investors that are in for the long term. If you are concerned about current price or waiting for dip before buying that means that you have shifted from DCA method to buying the dip as it's mentioned above. Why DCA it the best buying strategy is because in the future the current price that you are buying now and you think that it's on the high side will be considered dip in the next circle. If you understand this simple logic you won't bother if you are buying in ATH price, Bitcoin will always increase in price and value to always make you a profitable investor.