The dca method allows us to invest with out firstly waiting for the price of bitcoin to go down before buying bitcoin. Those who actually waits for the market to go down before buying are mostly traders, investors invest in any market conditions they don't wait for the price to drop before buying for example you might be targeting the price to drop below $90 before buying and your expected dip do not occur which means you won't buy meanwhile the purpose of the dca method is to buy bitcoin at any market condition be it low price or high price, this will also make you stack enough bitcoin because you are consistently in the market buying without waiting for any dip when ever there is dip you can decide to buy aggressively without overly doing it and stack more bitcoin and hodl for period of 4-10.