Time not included since bitcoin market is unpredictable, but your personal analysis and forecast is highly welcomed.
Is there any other strategies needed to accumulate bitcoin?
To me since we already have the DCA method which I think everyone is applying to accumulate bitcoin gradually there are no much other thing I know anyone can apply than that, except if we are talking about how much they should used to accumulate their bitcoin. Of course its always advisable to use a very little amount we don't budgets for something very important to invest in bitcoin and this, we can hold it for as long as we needs it without being so much in hurry to pull it out without letting our investment gets to the right time we have projected it.
At the outset it can be said that no further strategy is required to deposit Bitcoin but everyone has different plans, which is why other strategies may have a place there. To my knowledge, DCA is the most efficient process for accumulation. It is largely true that nowadays you can hardly find an investor who has not tasted this strategy, there is no better strategy than an investment approach that allows you to start with a small fraction and embark on a journey with big dreams. It should be added that depending on the market situation and investment strategy, there may be other methods such as investing in Lamm Sump. It may be true that which approach is best for all of us depends on our risk-taking ability and investment horizon.