As an Ethereum developer, one facet of it I have never understood is its unequal wealth distribution. Unequal wealth distribution makes fees more expensive for everyone because wealth is concentrated in the hands of a few, who can drive up fees for dApp developers. Even for a cryptocurrency, 72 million Eth were mined in its genesis block through a pre-sale -- that's nearly 80% of outstanding Eth, sold at around 40 cents per Ether.
Yet, on the Ethereum wikipedia page https://en.wikipedia.org/wiki/Ethereum, it says that only 13% of the total supply were mined in the initial pre-sale. Why do they say that, when it is on everyone's computers in the actual blockchain? https://etherscan.io/stat/supply. Additionally, I get the feeling that this facet of Ethereum's roots has been "whitewashed" from the internet and within Etherem's companies, because it looks bad on Ethereum and its founders have the wealth to do it. I have never seen an article describing the potential impact of such an uneven wealth distribution within the future of currency.
In my opinion, Ethereum is a great product but it's not suitable as a public currency. Ethereum, like most other cryptocurrencies, is way more pyramidal than any other financial system. Ethereum, in fact, is more pyramidal than other cryptocurrencies.
Imagine if 80% of all US dollars were controlled by less than 100 people, as happened in the pre-sale. Who would ever want to own a currency like that? Regardless of whether you think the pre-sale holders sold, I don't trust an anonymous currency that's price could crash at any time due to one of the founders selling off. Overrall, this is really bad for long-term adoption of Etherem, because people won't want to join an "old boy's club" of pre-existing wealth and control.
I learned about most of this here: https://projectoblio.wordpress.com/2017/06/17/how-to-scale-a-smart-contract-blockchain/... kind of a weird site but its blockchain stuff is interesting