You seem to have a misunderstanding of the DCA strategy in total.

The DCA strategy is not for poor people or for those with little income, it has nothing to do with how much you are earning the DCA strategy is simply dividing your capital into parts and investing or buying at intervals and this is done for some reason which is to.reduce the impact of volatility on yoir portfolio, you know that bitcoin is still a very volatile asset and to avoid situations where by you buy at a price and then the price dips and you portfolio would be at lose, but with the DCA method you get to buy at every intervals and price points so those fluctuations in price would not affect you, and why it is recommended here is beach it sis more beginners friendly and you don't need much knowledge other than to know how to buy and hold to get started with the DCA unlike the buying the dip strategy that involves some level of timing the market and more knowledge to be very successful at it. So yeah there is no barrier in using the DCA strategy.