[vbuterin]

The whole point of my post was that instead of the Gini we should use a more targeted index that specifically measures the presence of super rich that can unilaterally flood the market with their coins, and does not concern itself with whether the long tail of users has 0.03 coins each or 0.003 coins each.

[TekMol]

Interesting. While reading the post, I did not have the feeling this is the main point. But yes, the point is probably equivalent to the measurement of 'concentration' for which you propose the Herfindahl–Hirschman Index and other formulas.

Is there good data out there to use as input for those formulas?

Often when I read about distribution of crypto, the numbers used seem very foggy. Like account balances on the chain. Those could mean anything. One individual might own 1000 accounts (in a wallet). One account might belong to 1000 individuals (on an exchange).

I would love to hear about some rough estimates for different crypto currencies. Like "How much ETH do the top 10 holders hold"?

[vbuterin]

There have been attempts at doing this, eg. https://cointelegraph.com/news/new-analysis-of-top-10k-ether...

I imagine you would have to talk to the analytics firms to get the best-in-class attempts to figure out what the split between individual users is.