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.