How many people own a full Ethereum?

I'm curious, how many individuals worldwide can actually claim ownership of a full Ethereum? Considering the fluctuating value of cryptocurrencies and the high cost of a single Ethereum, I'm wondering if this milestone is achievable for the average investor. Is it a select few who possess the financial means or are there more widespread instances of individuals owning a complete Ethereum? Furthermore, what implications does this ownership have on the overall Ethereum ecosystem and market dynamics?