Yes in terms of investment lump sum investment can be very useful for an investor if he has excess money supply but he has to choose the right time to do it like dips price trend. If you don't get suitable bearish then you can start depositing bitcoins with DCA method and if you get low price of bitcoins during deposits regularly then lump sum buy may be more useful for you to get more holding in less time.
In terms of investment, a handful of investments may be useful for an investor when the market is down and he has excess money supply at that time. Waiting for a dip in the market to make a lump sum investment seems nothing but foolish to me. Because we can't say anything accurate about the market as cryptomarkets are associated with volatility. If we have cash, why should we wait for dips and stop investing regularly? If we have a guaranteed source of income for investment, we will be ready to buy immediately, and even focus on buying bitcoins in any market situation.
So that Bitcoins are constantly accumulating and growing in our investment portfolio. Investors simply waiting for dips to invest can hinder their investment. As we have seen the top bitcoin holders in the world never wait for a dip in the market they do not hesitate to buy bitcoins whenever they have cash flow. Their only goal is to make bitcoins at any price and increase their bitcoin investment or bitcoin holdings.