Personally, I do prefer to consider all three categories of accumulating if I either receive some additional cashflow or if I realize that I have more cash onhand than I thought that I had needed. For example, if I am going through my monthly expenses, I might have a certain quantity of money in various accounts that are used to pay various expenses, but then after calculating the various expenses for that month or even trajectoring out for further months, I might come to realize that there may end up being some extra money in the account, so then having that extra money would justify considering: 1) lump sum right away (or various lump sums), 2) allocate for buying on dips that can be set at various intervals depending on buy orders that might already exist (money that is already allocated for buying on dips) and/or 3) DCA over a certain period of time with various amounts.
You are right @JJG because it was a similar strategy I used a month ago, so actually I had some money on my other bank account and some more money I was expecting from my business including my monthly salary so when I sum up all the money together I was having a good reasonable amount of money. So at first I had to estimate the amount of money that could possibly sustained me and other needs up to two months, so however after all the calculation I was still left with some good amount of money so I wanted to wait for a dip before investing all on Bitcoin but however I became panic that I could be waiting for the Bitcoin price to dip before buying while the price can continue rising as such I may no longer find that opportunity again, so had to Lump Sum the money.
So however since I'm not expecting too much on this month I had to maintain my normal DCA strategy.