Buying every dip between -2% to -8% is a good choice if you want to accumulate. Of course, it's still a good idea to do DCA rather than all at once - but the best option of course depends on the amount of budget you have. If you have $50 in your account and at that time the price of bitcoin falls by -7% - then don't do DCA, but buy it lump sum.
I keep regressing on what you said, of course a decline in price of - 2% to - 8% is good enough to accumulate Bitcoin. I would speak on my own understanding, it depends on the price at which the price drops, we should be able to differentiate when Bitcoin is being volatile and when experiencing a dip. So we can know when to apply our strategies, for maximum profits.
There's no point buying with DCA if you have a low budget - say $50, I mean the bitcoins you get won't be significant. So consider decisions wisely and be wise in making decisions even if you are not good at analyzing.
Who on earth would want to set a budget of such a little amount, those who invest this little are those who always wait to buy the DIP but those Dcaing will need to invest large amount cause they keep buying at different prices, bit by bit base on the budget they have in mind.