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.
Yes all what your saying is correct about human nature , I don't argue about natural feeling when ever investment is going down because expectations of every investor is that their investment should be going higher but this can only affects those that never know the market and how Bitcoin investment work from the beginning or those I called spy investor in my way of defining the category of investor their Target is always to quickly take profit as in form of trading, but those who have future focus on the investment don't look at the swing of the market or investment but focus most on long term results and this kind of investor don't panic in any condition the Bitcoin is going through because they know it's just a temporary thing but those I called spy investor always panic because their investment is short term without a base of future focus. There is no doubt that those that complain most when little shift occur in Bitcoin is moreless short or trader in the system a real Bitcoin investor with long holding and accumulating hardly complain much or even have a rethink because he knows that such swing will always happens as normal thing and it has nothing to change in the investment as much as long term is concerned.