No matter what we shouldn't undermine the important of knowledge in bitcoin investment without basic knowledge we can't really know if we have the discretionary income that is needed for investing in bitcoin. However knowledge is useless without action, for that all we need to start investing in bitcoin is basic knowledge and the ability to determine whether we have the discretionary income to invest with. Therefore every other thing we need to know as regards our investment we can learn it along the line while accumulating bitcoin.
Knowing what discretionary income is and having basic Bitcoin knowledge are two totally different things. The discretionary income idea and meaning can be implemented in different areas when making financial decisions and not just on Bitcoin. The basic knowledge for Bitcoin is for the user to have the average information of what they actually want to get into and how to deal with it without needing someone to hold their hand while they learn in the process.
Having a basic understanding of Bitcoin and making a consistent effort to learn about it, as well as accumulating Bitcoin regularly from a discretionary income stream, is a combination of the two that is essential for you to be successful in investing. The example of wealthy investors may be different because they have a lot of floating funds and can deposit Bitcoin in any way they choose. But you should practice simple strategies for poor and middle class investors to accumulate Bitcoin. All the elements of how poor investors can consistently accumulate Bitcoin with limited income and what strategies they should employ to do so in the long term.