You don't need basic knowledge to kickstart your bitcoin investment because that will waste your time from accumulating bitcoin when you should. Learning is a process so you cannot procrastinate investing in bitcoin until you have basic knowledge instead of wasting time, you can invest and learn Stimutatoulsly. It is not right for you to delay investing in bitcoin cos of basic knowledge, you don't need to know everything to invest in bitcoin rather if you have your discretionary fund available you only need apply commons sense to invest,as you invest you can be learning. This way you wouldn't delay starting your bitcoin investment due to your lack of basic knowledge.
Basic knowledge is needed which is knowing how to identify to having discretionary income and how to buy, these knowledge are very basic and is enough to start buying and holding bitcoin, you cannot begin buying with zero knowledge about bitcoin, so with common sense and the above basic knowledge, you're all set.
Well it's true what you say, when income increases, sometimes needs also increase too, this is like a law of nature that does happen a lot, and in my opinion only a few people can survive with the same needs even though their income increases. And with what you say there is still a possibility not to invest in bitcoin because it is hindered by its increasing needs, the conclusion that can be drawn is that if you really intend to invest in bitcon then from the beginning with income that has not increased it might be possible to try even with a very small amount. Yes, there is no other strategy that can be used than DCA, because this can be done consistently and is indeed better that way.
I agree with you that as income increases, many people's expenses also increase. Also, it is a good idea to start small with a small discretionary income rather than waiting for income to increase. Because many people postpone it with the excuse of "I will start when my income increases". But later, when income increases, its expenses also increase. This delays starting again.
However, I want to say something about the part of your statement that I have bolded, because you are probably wrong. Yes, I believe DCA is a good strategy. Especially those who have a small amount of discretionary income coming in from regular or irregular cashflow, they can follow the DCA method consistently. This reduces the pressure of timing the market perfectly. But I want to tell you that DCA is not the only strategy. If someone already has a large amount of discretionary income or additional investable money, then they can buy lump sum, partial lump sum, DCA, dip buying or regular purchases with occasional additional purchases. It actually depends on that person's personal cash flow, emergency fund, risk tolerance and mental peace. Therefore, it can be said that although DCA is a good strategy, it is not the only strategy but one can also follow other strategies by understanding their own financial position.
In addition to what you've said, there could still be a mix of both DCA and lump sum/front loading. In a scenario that the investor receives a bonus from work, he may decide to put it all into bitcoin while still maintaining his consistent buys, now he has done lump sum alongside DCA.
Another scenario when he receives a bigger amount by chance and decides to spread it accross some weeks to buy a bigger quantity within those weeks, that front loading since he adds the received funds to his normal buying amount within the specified periods to buy more quantities.
