When Bitcoin was first launched in the market, many people did not dare to take risks. Because Bitcoin was new to the market at that time. But in the current situation, many people do not dare to buy Bitcoin because the price of Bitcoin is very high. All these people will never be able to do anything good from the Bitcoin market. Because they get restless after seeing small market declines. In the case of Bitcoin investment, you have to have complete faith in Bitcoin. I think Bitcoin is still far from what Satoshi Nakamoto thought about Bitcoin. Whatever the price of Bitcoin is, as an investor, you should keep buying continuously and keep buying continuously until you can accumulate enough BTC in your portfolio.
I disagree with you mate, when Bitcoin was launched into the market, the reason why some people did not buy was not because the price was high no rather the reason why some people did not buy Bitcoin back then was because they did not know Bitcoin will be this valuable and great that is to say that they didn't see the potential of Bitcoin, they were so myopic and some even see and address it back then as a scam and today those people who was seeing Bitcoin that way are regretting why they didn't t make use of that opportunity.
You said the price of Bitcoin was high which is wrong and even if the price of Bitcoin was high, they didn't ask anyone to buy it at a time, the DCA method was there so why didn't they use the DCA method to be accumulating little by little, see the thing is some people were not interested in It, they were not thinking what it will become of the asset in years coming rather they were just thinking within the box ( what will happen immediately).
Today some people are still saying this you said that the price of Bitcoin is high, remember nobody ask you to buy a whole number of Bitcoin (1 BTC) at or in a time rather you are advise to use any of the 3 strategy or method that best suits you ( the one that will be convenient for you), the DCA is there to help people since they can not buy a Bitcoin at once, an investor who knows what he wants no matter the situation will always device a means to make something work out for him or her. And note, one thing is for sure and that thing is someone who will not buy Bitcoin will never buy no matter how the price of Bitcoin drops.