That depends a lot on what I did the hours that don't belong to the 39 hours of work. Depends on my interests, social life, who I know, which contacts I may have, my natural networking ability. I think your question was general, so my response is "depends on the person"

If it was personal to me: I'd probably pull off one million with high certainty, and several 25% would be my expectation. Meaning how much money would be in the bank when I looked at it when I was 55 years old.

The more relevant issue though is what is the 10% for a given person. Is my best 10% both in luck and effort around 5 millions? 15 millions?

Is anyone's 10% billions?