Despite its volatile nature, Bitcoin surely will always appreciate and thus, investing up to a half of Income is a wise one with future mindset.
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 .
You can choose to invest half of your income in Bitcoin, it all depends on how much you earn and your financial responsibilities. For instance a young person that is working and is still living and been fed by his parents don't have much responsibilities. Such a person can afford to invest more than half his income on Bitcoin, pending when he'll be totally independent. But for most of us that have recurring financial responsibilities it is not a wise financial decision to invest half of our incomes on Bitcoin.
Except for investors that choose to live way bellow their income but it's not recommendable, every income earners should have a balanced budget. They shouldn't deprive themselves of quality lifestyle according to their income because they want to buy aggressively. My advice is minus your basic expenses from your income and put the rest into discretionary funds from there you will decide what percentage that goes where including Bitcoin accumulation.