SEC Inquiry On Proof of Stake

Prior to approving an Ethereum ETF, the SEC put out this inquiry to the public inviting responses:

“Are there particular features related to ether and its ecosystem, including its proof of stake consensus mechanism and concentration of control or influence by a few individuals or entities, that raise unique concerns about ether’s susceptibility to fraud and manipulations?”

What are some responses that could reasonably be made to this inquiry?

Thanks