qI agree with you that buying at the dip should be done with some unexpected funds that comes our way which we don't have plan for, and whether they come or not, our regular DCA continues. What I do is that whenever, I am given a bonus at work or traveling allowance, training allowance, or some incentives for motivation at work. I keep such funds without touching it so that if it happens that bitcoin price dips, I can take advantage of the dip and buy more. And if it happens that I don't have any extra funds apart from my monthly income, my regular DCA is what I do and focus on more weekly
When it come to accumulation of Bitcoin, we should always keep our DCAing constant irrespective of the market conditions. Expecially those of us that can't afford to purchase large quantities of bitcoin. Because if one have the mindset of always waiting for the dip before accumulating he or she will only endup missing out or having small quantities of bitcoin in their portfolio.
That's why is better to save some funds (which is known as reserve funds) in case any dip occurs one can purchase the dip with the use of reserved funds, and he or she can choose to spread it out or
go all in with the reserve funds like lump-sum purchases.The concepts or idea of the lump sum completely has nothing to be talked about in terms of buying the dip, the idea of the lump sum buying has to do with making purchase of Bitcoin with the huge sum that is readily available to be invested right away without considering whether the market condition is in dip or not.