The idea and concept of the Lump sum buying entails buying right away, it has alot to do with investors decision to invest right away with the available huge amount without considering market condition, maybe you are describing buying the dip instead of a lump sum buying,
I mean, if the market condition is favorable, then yes, 'Huge sum can be invested', this is lum sum investment all by itself.
Investing at a favorable market price is a plus point 'if achievable,' otherwise, it depends on person to person 'depending on the market condition they want to invest in.'
Bitcoin is not like alts. Bitcoin is Bitcoin It controls itself and also controls the entire crypto market. When you talk about Bitcoin there shouldn't be any fixed investment period. Because Bitcoin moves in a circle. So the price of Bitcoin is never capped after going down. The price of Bitcoin drops for a short period of time but quickly rises again. Those who have been in the crypto world for a long time know very well about the behavior of Bitcoin. No one has ever lost a long-term investment in Bitcoin. Because no matter how exorbitant someone buys Bitcoin, Bitcoin has created an ATH at a higher price. This is how Bitcoin will behave in the future. Because it has a fixed supply that will never increase. But the global demand will increase day by day. So one should always continue to invest in Bitcoin following DCA, and if one gets Bitcoin price dip then it will be a big pluspoint for him.