For investment to be successful in a long-term plan, you need to have more fiat. You can decide the amount of fiat savings depending on your situation. But I would say, divide your income into at least three parts, from which 1 part is used for meeting daily needs, 2nd part is saved for reserve fund or emergency fund and 3rd part is used for investment. Or you can invest another 4th by dividing it into 4ths and investing in real estate, which will be your alternative source of income and you will be able to use more money to invest in Bitcoin.
It's not possible for you to divide your funds into four parts to achieve all that you mentioned above. I agree with you that you can divide your income into three parts. Your discretionary income is what can be divided into the part apart from the funds for your monthly up keep. You can use on part of your discretionary income to invest in bitcoin and keep the other in fiat for your various back up funds.
It's good that investment should be done one after the other so that you don't lose focus and get stuck on your way. Don't you think that sharing your funds into four parts and invest in bitcoin along side trying to invest in real estate will not make you build and grow one of them easily. It's better you focus on investing in bitcoin alone and go your portfolio to a certain level that you feel you have more than enough bitcoin before you can diversify to real estate.
Imagine how will a low income or average income earner invest in bitcoin and at the same time invest in real estate, it is impossible because real estate need big amount of money to start, unlike bitcoin that you can buy with an amount as low as $10 gradually every week consistent and persistent over time. It means that investor will not achieve any of these investments in the long run because he would be distracted with too many things on his little discretionary income. Currently, bitcoin investment should be our first choice and our priority because it is more profitable than any investment currently and in the future.