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You should understand that the purpose of this thread is to discuss about bitcoin and how it can be invest easily for those who really want to invest in bitcoin. You can choose to invest what you may think is good for you but as for many of us in this thread we choose to invest bitcoin and we will always preach about bitcoin to beginners and those who don't have much understanding of going about it. The DCA method is one of the simplest methods that is used in investing bitcoin no matter the financial status one belongs, just be consistent and eith time you will be able to accumulate fine amount of Bitcoin which will be profitable in the future if you hodl it.
Bitcoin is still the main thing that must be suggested to beginners and also to everyone even though everyone still has their own thoughts on investment. But for advice like what you said it is very right and very true to be well received by everyone by implementing one of its best methods even though in general the DCA method is very good to run for those who want to try investing in Bitcoin. Your suggestion is not wrong at all in this regard and preaching about Bitcoin should still be considered the best direction without getting tired because it can definitely trigger more people to like Bitcoin to the point of making them buy it non-stop.