I'm not sure what it would be exactly, on an average investment. However, living in Utah, I can survive on 4k a month, even 3k. Rent is 1400. Groceries, Internet, etc. Work from home means no commute expenses.

The poverty line is a general guideline. It doesn't take into account particular circumstances.

In my current robomanaged investment fund I get roughly 9% yoy. If I had 400k invested I would get annually 30% more than the average salary in my euw first world country and basically never have to work for the rest of my life.

It's acutally above avarage wage in most parts of the world