This is to all newbies who wants to start their bitcoin long-term investment. It's good that you figure out how much you can use from your extra cash to invest in bitcoin from your income. This will enable you buy whenever you have received your income using DCA strategy. You shouldn't use money for your basic needs to buy bitcoin and start starving yourself or endanger your health.
The best investment rule is to always use 10% of your income as an investment, but after setting aside the emergency funds out of the remaining 90%, I don't see anything bad in cutting down food expense or starving oneself just to invest in the future as something bad if you want to implement a disciplined savings plan while you also invest regularly using the DCA method. Besides, most of the food we eat these days is unhealthy, as it looks, and according to research, most people who reduce their eating habits are healthier than those who fulfill the daily square meal.
Bitcoin investment should be done with ease by using only your discretionary income to invest gradually, that will relieve you from financial stress, and enable you to control your emotions when there is a dip in price to achieve your long-term goal.
You have a point, and after the emergency is set aside out of the discretionary income, there's bad going all in when there's a dip in the market since you're not using the emergency funds.