Yes as long as Bitcoin investment is concern we don't only need to hold and wait but we should just keep on accumulating more and more Bitcoin until we are satisfied with the quantity of Bitcoin we have accumulated not in less than 3 years below but 4,5 years and above, we can buy more Bitcoin using both DCA method and the lump sum strategy which will help us accumulate more Bitcoin in a long run.
Well said, I would also love to add that the stash of Bitcoin any investor would accumulate is not solely dependent on the number of years, but the amount invested aggressively or conservatively is what builds the portfolio. An investor who is investing $10 for 4,5 years above as you said would not have any good stash of Bitcoin, but another who invest $200 using same time frame will accumulate more, thus we see the relation, it goes on and on.
In essence what matters is Amount readily for the investment aligning with your plan (Target), with any suitable strategy used by the investor.