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The ease of using the DCA method must be accompanied by confidence, because this confidence will ensure everything runs smoothly without being affected by anything, because we are confident that no matter what happens, it will not prevent Bitcoin from continuing to rise in the long term.
Every investment comes with risk and the same applies for bitcoin too and you can never say I am 100% sure that bitcoin will be higher in the next 5 years from the current price and it will likely to be but my point is there's always risk factor in it which creates pressure for retail investors.
It was in the past that people were saying they aren't sure if bitcoin will increase in price in X number of years. But in today's world that bitcoin has come into mainstream, we shouldn't be saying that again. If people that are investing in gold, stocks and bonds are confident that their investments in those things can will give them profits X years from when the investment was made, why can't bitcoin investors have such confidence that bitcoin price will increase from it current price in five years time? I know someone will say there's no guarantee in it, but let me ask is there any guarantee in those other forms of investments?