It seems that you are getting DCA mixed up with other kinds of investing (such as lump sum investing), because DCA overcomes each of those items in your list because once you get started, then DCA makes it easy to overcome each of the items, because all you need to do is pick an amount.. $100 per week set it and forget it..... and if you think that $100 per week would cramp your lifestyle too much, a different amount could be chosen.
We can determine the amount that can be allocated for DCA needs based on weekly or monthly income, at least an investment allocation of $30-50 can be reached by all economic classes for the lowest amount to realize the DCA strategy per week.
Even though I throw around recommended amounts that are $100 per week and then $10 per week as a fallback position, I am ONLY using those kinds of numbers in a kind of framework in which many people should be able to put together some extra money, and I remember in more than 30 years ago, I was fairly new in my investment journey and I was able to set aside $100 or $200 per month, even though the amount that I made was really low back then, and in some sense I figure that more than 30 years later it should be much easier for people to put aside $100 or $200 per month, because the dollar is ONLY worth around 20-40% as much as it was 30 years ago.. depending upon which products/services you are purchasing.
Nonetheless, we cannot presume that people have disposable income, even though an overwhelming majority of people should be able to put themselves into a place in which they have disposable income, which means that the amount of cash coming in on a monthly basis is greater than their expenses on a monthly basis.
If you do not have disposable income, you should not be investing. If you do not have disposable income, you should be attempting to put yourself into a position in which you have disposable income in order that you will be able to invest.. and yeah, we see bitcoin as a great place to put such disposable income, yet people still have to get to a position of having it before we presume that they have it, even though sometimes with some tweaks people could get to a place that they have disposable income.
Another problem that a lot of people have is that they enter into a lot of debt that they probably should be attempting to get into order prior to investing, but many times, there can be ways to pay down debt and to invest at the same time, but there are needs to put together plans and to attempt to stick to plans when a person might not outright be in a position in which it is reasonable to invest and they have to juggle around their finances in order to invest when probably they should be placing a high priority on getting their shit together.. .. so I hate to preclude people from doing several things at the same time, as long as they are able to have a plan and to attempt to follow it and have a timeline for making progress on getting themselves to a better and more sound financial/psychological place.
We must consistently carry out the DCA strategy until we reach the planned investment target, if we set a target of investing $2.6k in bitcoin every year, so the calculation is that every week we have to invest $50 for 52 weeks.
Sure. Once we have our number, we can attempt to be strict about it, especially if we are reasonably within our budget, including having various cushions in place that are suitable/tailored to our situation.
.. and then just let the investment strategy ride for several years, and sure maybe after a few years, there might be some needs to look at how the investment is doing and then to reassess whether further actions might be needed, and if the amount is starting to add up to a lot, then having stake in the game may well motivate further activism in regards to the investment.
We need at least 2 years to more optimally assess the progress of investment performance, because the DCA strategy is different from instant investments of large amounts, I think DCA investments are like savings for the long term and DCA investment options are very appropriate for converting to bitcoin, even though the market movement category is the highest but Bitcoin price can reach ATH every time after the halving period or more or less within 5 years, I quoted in another thread which stated that who would have thought that we could buy an iPhone 15 with just 0.03 BTC, imagine if you implemented DCA since 2015 then the investment performance progress would be very profitable.
Since bitcoin prices are generally trajectoring UPward in spite of some 2-3 year short-term questions regarding profitability of the DCA strategy, the longer that we have employed DCA, the more that we would currently be in profits, and currently it takes close to 3 years to clearly and unambigously start to be in profits from a strict DCA strategy. You can
play around with the dates on this website, yet I think that the bigger picture does suggest that the longer that you have been in then the better off that you should be so long as you would have followed a strict DCA strategy, and surely people who follow a strict DCA strategy might not even be participating or reading a thread like this, especially since many guys in this thread are figuring out ways to hybrid their DCA strategy or even to abandon DCA in order to employ buying on dips and other strategies that they believe might be able to perform better than a more strict (and arguably mindless) DCA strategy.