Can you sell Ethereum PoW?

As a keen observer of the cryptocurrency market, I've been noticing the ongoing debate regarding the transition from Ethereum Proof-of-Work (PoW) to Proof-of-Stake (PoS). Given this major shift in consensus mechanism, I'm curious about the practical implications it has on investors. Specifically, I'm wondering: "Can you sell Ethereum PoW?" Is there a market for the existing Ethereum mined under the PoW system, post-transition? What are the potential risks and opportunities for those considering selling their PoW Ethereum? Furthermore, how does the community perceive this transition, and what impact does it have on the overall value proposition of Ethereum?