what people need to be able to focus on their investment is they need to think about the big picture of their investment and invest the money that they are ready to invest. because there are many investors when doing DCA they are not ready to use their money for that, and when the market experiences a shock, they end up worrying about their assets that are decreasing in value, and then they sell some or all of their assets because they are not sure about the market.
An investor who always get worried over his investment on Bitcoin because of some little move he saw on Bitcoin price movement is obviously not ready for an investment because one thing he must understand is that in as much as Bitcoin is a very good potential investment doesn't mean that it will not go through some ups and downs on the process because for someone who has a good dream of the future of Bitcoin will never allow those things to affect his psychology on his investment, however that's actually the difference between those who have serious passion and desire for Bitcoin investment and those who came to Bitcoin investment only because they believe they will make some profits in the time to come.
yeah someone who wants to invest in bitcoin needs to see how capable they are in holding their investment since bitcoin is a volatile asset and its movement is quite difficult to predict. they must be able to understand that investing in bitcoin in a longer period of time is more profitable for them compared to investing in a short period of time. but in that case they need to see how their psychology is, whether they are able to hold bitcoin in a longer period of time or not at all, don't just because of the profit in the short term they ignore the potential for better profit in the future.