Somewhat related you may find the poll feature [1] useful. Requires at least 200 karma which you are above. I don't know the answer to your question. I suppo

Somewhat related you may find the poll feature [1] useful. Requires at least 200 karma which you are above. I don't know the answer to your question. I suppose it would vary by region, inflation, economic stability and of course that persons burn rate. If they were a philanthropist then perhaps H. >$1T to sustain their personal contributions throughout part of their lifetime and remain wealthy until the end. If they had a simple life and lived in a region with a low cost of living then perhaps most of those answers could be correct given you stipulated Ultra. [1] - https://news.ycombinator.com/newpoll https://news.ycombinator.com/newpoll