Investing up to half of your income it’s not actually ideal , in as much you consider the bigger picture of Bitcoin in the future , you should also understand it’s a long term investment, so you are adviced to invest with your discretionary income, so that it won’t affect you unless you have other business and investment that can fetch you some money , if not investing half of your income may affect your accumulation journey or properly result to selling when you don’t have much money with you .
It depends on your responsibilities and the level of your income too, if you're someone that doesn't have much responsibilities and lets say when you divide your income it will still be enough for you to satisfy your domestic needs and other emergency needs too, I don't think you should have a rethink of investing with half of your income although what matters in bitcoin investment is, if you'll be pressure free after investing with half of your income, everyone knows that source of income and how much they make daily, weekly and monthly, so it wouldn't be nice to act foolishly and abandone your investment half way, so if it what will sustain and keep your investment intact continuously is to divide your income into four to five places to be making use of one part for the investment continuously that's fine after all the target is getting a good portfolio overtime.
As a bitcoin investor, the only income you need to invest with is just your discretionary income and nothing much. A lot of folks tend to get themselves worked up over little things that shouldn’t be a worry to them as long as bitcoin investment is concerned, you need just a discretionary income to invest with or to even continue sustaining your ongoing bitcoin investment. Knowing fully well that bitcoin investment is a long term investment and for an investor whose initial strategy is focused on the long term goal of consistently accumulating and hodl, you don’t need to get yourself involved in some kind of dramas that doesn’t really worth it, all you need do is to be able to figure out your discretionary income and invest with it. The DCA method of investment makes it even more flexible for you to invest with without getting to worry about how much you should invest with, rather you only have to figure out what’s your discretionary income for the week or month depending on how your income flows after you might have been able to sort out your other financial obligations, the amount left with you should go for your discretionary income and that’s just what you need to invest with or sustain your seemingly ongoing bitcoin investment and gradually build up your portfolio for the long term goal.