You're right lump sum and buying the Dip are still good techniques but yes, a lot folks out there will still prefer using DCA strategy to buy Bitcoin because it is convenient . Lump sum requires a folk to buy Bitcoin with a large sizable amount of funds(discretional income) at once which can be quite expensive for some folks who cannot afford it but with DCA,even with the little amount of discretional income at hand or made available,one can still be able to buy Bitcoin with it anytime provided his discretional income is ready. DCA strategy makes investments in Bitcoin to be easier,less expensive and keeps you ahead of the markets in terms of accumulating bitcoin without timing the market by consistently buying Bitcoin regardless of price and time. In my own case,DCA works better for me and have made it a lot easier for me to be buying bitcoin steadily once my discretional income is ready no matter how little it is in amount.