Q. What is the most appropriate amount to earn
(This is question I have been after a very long time and after thinking and rethinking I guess below is the answer)

Ans. Minimum Sustainable Amount.

A. If one earns more than this amount other competitors will enter the market with better packages and take away the benefits.  Thus making the free-flowing nature of acquiring work tougher, as one will need to do things like standing upside down etc to get the same and will make one overexert and eventually put oneself in danger .
B. If one earns less than this amount they will not be able to sustain.