This method is especially useful for those who cannot afford to buy a large amount of bitcoins at once but are willing to invest in bitcoins. Only they can invest in this method and buy bitcoins in small amounts and hold it according to their specific goals.
The DCA method is not only for those who want to buy Bitcoins but cannot buy them all at once due to lack of funds. The DCA method is for anyone who wants to invest in Bitcoin. Everyone knows that Bitcoin market is the most volatile market. If you are a true investor, you definitely don't want your money to be lost after investing. To catch up with what you said I would have had to go back another 8,9 months and invest when bitcoin was $35k,$36k. But now the price has reached $70k! Now what if someone invests a large sum of money at once, and 2 days later the price of Bitcoin drops to $40k? Have you thought about that? I think no investor can think like that.