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Any trading requires knowledge, so here if we want to invest in Bitcoin, we must gather our knowledge in different ways. Because according to DCA strategy we need to invest Bitcoin once every week or once a month according to our source of income. And not every time a small amount of assets from an exchange can be stored in one's wallet, a small amount of assets per week or month for a long time can be hundreds of dollars. Big sellers may not contact you as per regular DCA strategy (since you are a small investor) in which case you will have to wait for a long time and turn several hundreds of dollars. This way you can own a large amount of wealth at one time but have to invest regularly.
I'm not sure whether you really understand the DCA strategy well or not. But be aware, DCA is a strategy that requires you to divide your investment budget into several parts; for example into 3 parts. It's up to you whether you want to use 50% of your budget on your first purchase and use the other 25% on your second and third purchases, meaning you can still adjust it yourself.
The best investment goal to consider is not getting rich. However, you have to think wisely about what your main purpose of investing is, for example as a provision for life in old age or for your child's education costs for the next 10 or 15 years. We will never get rich just by investing $1k to $10k today, but if you want to be rich then invest more. But it is good if you have a wiser plan about what your investment goals in bitcoin are instead of getting rich.
Of course, I agree with what you said, DCA requires us to divide the budget we have or the point that we are ready to allocate to bitcoin itself. And well for myself maybe I will divide my budget into several parts with the same amount every time I want to allocate, whether it's once a week or maybe once a month, nothing else for me is indeed a safer way and to reduce the risk of fluctuations that occur, and also of course I will continue to do it with the same amount so that the price - the average - that I take can be more stable.
Honestly for the problem of investment goals I think it depends on the perception of each person who comes, I can't manage it and for the perception of getting rich in the future I also can't deny this statement because indeed investing especially in bitcoin gives you the opportunity to get to the point you expect but I say this is just an opportunity and will not always be what you expect. By using DCA I understand it is very possible to achieve in the future, but well just agree with you that it is best that we have to think wisely and rationally and also not too much. Putting a bigger budget with the aim of getting rich, well that can be done if your finances support it, but still you have to consider the level of risk too.