Yea you are right,there are different method in which one can use to accumulate their coins not just DCA. It all boils down to the nature of your income during a given period of time. Buying at dip is always an opportunity for those who see the market as an opportunity for them to acquire more bitcoin when other investors are selling off due to panic,this strategy helps to buy large amount of bitcoin at a cheaper price. On the other hand buying at lump is for those investors who have plans to accumulate bitcoin when a huge amount of cash comes in and they invest it into bitcoin because they understand that bitcoin is a store of value and an asset to keep their funds away from depreciation,this practice is always done once in a while. The last set of investors are those who use the DCA method by accumulating their bitcoin gradually from their monthly income,a fraction of it is use to accumulate more bitcoin to their investment portfolio, due this strategy might not be regularly done due so some unforseen circumstances that can increase our emergency spending. I do accumulate my bitcoin in two of this methods but it depends on my present financial statues. I DCA every month and sometimes when I have a good cash inflow which I don't have plans for that huge sum of cash that came in,I immediately use it to buy bitcoin,so that my funds wouldn't be hit by inflation and I can also have a good significant amount of bitcoin in the next 8-10yrs because I use bitcoin as a store of value which I will benefit from in the long run. These are some secretes that some investors fails to understand and instead they will always be checking bitcoin price to see if it is pumping or dumping,all these will discourage them from the mindset of hodling for long and they will sell at the unexpected time. Either they will be carried away with the anxiety of the high price and sell off or they will panic and sell of when the price dips lower than what they bought.