For sure, there may well be hardly any advantage to DCA over extended periods of time, if a guy has a large lump sum amount in his possession, even though there may be some preference to invest it in gradual ways, such as $1,923 per week for 26 weeks, and even that might be a questionable tactic if it is unclear if the BTC price might be able to stay down for the next 26 weeks. I doubt that plugging DCA into any situation is really going to resolve the issue, especially if there are questions about how to deal with a bunch of cash that is right in our bank right now. If the scenario was different, such as having the $50k coming to us over an extended period, then we may want to invest all of the amount of the $50k as it comes in.. even though surely many of us would also need to attempt to account for other income and/or expenses that we have every month, so if the $50k is extra money coming in there might not necessarily be any value to spread out the investment into bitcoin, except maybe over a few weeks in the case of $10k coming in at one time or some kind of a situation like that.
In terms of investment, there are two issues: limitations and possibilities of the DCA method and the one-time investment method. Just as the DCA method has advantages, the one-time investment method also has advantages. Generally, one-time investments are large amounts. Let's say a person invests 60,000 taka as a one-time investment, if the price of Bitcoin is 30,000 to 40,000, then the total profit of that person is higher. On the other hand, if the DCA method is invested, the impact of market fluctuations is less. Let's say a person invests 10,000 dollars in the first month, and the price of BTC is 25,000 dollars per unit, then he owns 0.40 BTC. Again, if he invests 10,000 dollars in the next month, and the price of BTC is 23,000 dollars per unit, then he will own 0.434 BTC. Thus, if he invests 10,000 dollars in the next month, and the price of BTC is 24,000 dollars per unit, then he will own 0.417 dollars. Then his total investment in three months is 30,000 and he has received a total of 1.251 BTC. So I think if a person does not want to analyze the market and wants peace of mind with low risk, then he should follow the DCA method, and if someone wants to make quick profits, then he should give more priority to one-time investments.