There are many investors who fail to invest in Bitcoin despite earning huge amounts of money. There are many investors who are encouraged to invest in Lump sum. They think that when the Bitcoin price reaches their expected level, they will collect Bitcoin which is a completely wrong idea. Those investors may find it difficult to hold bitcoins. Those who make low incomes but consistently do DCA to hold bitcoins will be ahead to holding bitcoins. There are many instances where a person earns a lot of money but fails completely to hold Bitcoins. To invest here one must take bitcoins responsibly which can help the investor build big assets after a long period of time.
I will blame their poor knowledge here. In such a process temptation works. A person waits for a specified time or price to make a lump sum purchase despite having enough money. Many times they fail to buy. There is nothing wrong with waiting to buy a dip or a single buy, but it is not very efficient to grow your portfolio. There is a saying, "Slow but study, is a key of success". The DCA method fully conforms to this sentence. Not guaranteeing success in DCO but DCA method is most effective to grow your portfolio.