Question

Do you agree that alert individuals who purchase valuable domain names should be able to sell them to the highest bidder? If so, in all circumstances or only in certain circumstances?

Answer 1

The motive of profit is the primary objective of the capitalist system. To seek profit is not wrong or bad at all because that drives the person or organization to create or seek opportunities.

If any person who has purchased a valuable domain and willing to sell it to the highest bidder is not wrong by the perspective of the business. We will have to accept that he spotted the opportunity and grabbed it only to encash it later.
This is similar to the strategy where an investor buys shares of an undervalued penny stock and then sells it after it becomes a large-cap company and cashing in a huge profit. That investor has spotted the opportunity and even carries the risk of such investment. The domain owner is doing just like that as he is not doing anything wrong unless it is not tradeable.

However, it is also true that the domain owner has received an economic rent and such rent-seeking in unethical if that is done with any not for profit organization. Further, there should be some framework where a third person should not buy domains that resemble the personal names of any celebrity because his objective is unethical in that case.