It is also not mandatory to purchase huge portions of Bitcoin at every DIP, since DCA approach can aswell be done during the DIP and is said to be the safest as is not by chance imposing a threat to daily expenses since it is done according to budget in respect to what we have in our reserved funds.
Huge portions is not a mandatory and that's very true, thus I don't think using the DCA approach to buying the DIP could meet up sometimes (you can't predict how long a Dip could last)...not saying it's not good but if you can get a Dip while DCAing then do it or you can just let it be with just your DCA entry luckily you might even get a more Dip entry. Instead of that approach then maybe splitting available funds for the Dip can be done, you don't necessarily need to wait for a particular interval to get it just buy as the Dip gets deeper (the current market is a good example)
The important point of DCAing is that you have a permanent method of depositing bitcoin in any price trend where you can do it regularly and uninterrupted. The price of Bitcoin keeps on rising and it tends to dips for occasional corrections which can accumulate more Bitcoins for the same amount of dollars. Basically you shouldn't try to follow the DCA method just in expectation of dips, you should have the intention of stashing Bitcoin for the long term. When you get the expected bearish then you should be an attempt to make a single buy to accumulate more stacks in a shorter period of time.