In this paper, I have shown that when the return of continuing to age eggs is less than the opportunity cost and storage cost, they should be sold and allowed to accumulate interest. Further using data from the Martian Economy, that time was estimated to be approximately 43.87 years. This is relatively far into the 50 year development of Martian eggs. However, it is not quite far enough that the seller need worry about premature hatching which would cause the value of the eggs to fall to zero.
This paper does not address any costs associated with newly hatched Martians, as they are entirely self-sufficient. Further, it does not explore the possibility of ungrateful hatch-lings providing for their parents at a future time, as there is no historical evidence of this happening. Finally, it ignores all psychic utility that could be captured from being proud of ungrateful hatch-lings. The latter two possibilities could be explored with future research, but this researcher finds both cases to be extremely unlikely.