Some people think that when income increases, income stabilizes, and better times come, they will start, and many people cannot build a position for years because of such false expectations. But you should understand that if you invest without understanding the basic costs, you may be forced to sell Bitcoin later in an emergency. You should first invest by understanding your own costs, income, emergency funds, and cash flow. And if you continue to invest in Bitcoin without considering these things, it is probably not a long-term plan, but an investment on a weak foundation. You should not show yourself as if meeting basic needs is what keeps people in poverty. You should not forget that basic costs do not mean luxury.
I don't like when we complicate things because they can make newbies to adopt wrong method and that can lead to losses and their eventual exit from Bitcoin for such person. From my understanding, , new investor simply need to know how to calculate his discretionary income so he can decide what part of it to invest in Bitcoin and the part to keep as emergency fund. The percentage the investor is willing to invest shows how aggressive he wants to be. There should be no fixed percentage of the capital that is generally perfect for everyone to adopt, the individual have to figure it out himself.