Who sells Ethereum?

Who exactly sells Ethereum? Is it individuals, large institutions, or perhaps a combination of both? Are there specific platforms or exchanges where Ethereum is predominantly sold? Are there any regulations or restrictions that might impact who can sell Ethereum? Do sellers typically need to meet certain criteria or qualifications to offer Ethereum for sale? How does the process of selling Ethereum work, and are there any fees or costs involved? Also, is there a demand for Ethereum, and how does that affect the selling process? Finally, are there any risks or considerations that potential sellers of Ethereum should be aware of?