You this guy, honestly you aren't learning, why would you even say that investment is not for everyone, it's only those that have a blood convenant with poverty that will say such a thing that investment is not for them,
The statement you mentioned is also not entirely correct. I want to know where you heard that poor people shouldn't invest, why they can't invest. We certainly know about the DCA investment method, which states that investments can be made with a small amount of money. So maybe those people will also be able to invest.
The idea of poverty is relative even though there is a generally accepted standard that try to define what poverty should be. I feel the proper definition of poverty is the inability to meet basic needs such as food, shelter, medication etc. If you don't have these basic needs, you have no business considering investing in Bitcoin because what you need is to find a job or a business that will help you survive first and leave you with surplus which is what you can make investment from.
It has been abundantly emphasized that the safe way to invest in Bitcoin is to only use discretionary income. If we do this, we would have already passed that discussion of poverty because anyone with discretionary income is definitely not poor even though we cannot say such is wealthy because it could be that he is comfortable and can set some funds aside for investment.