As for me, any coin that has ICO, IEO or IDO are securities. Also any coin that is using proof of stake are securities. SEC needs to come up with a clear definition.
That makes sense, but problem is that some that meet the criteria you mentioned (like Ethereum forum example) are not seeing as security by SEC while some very similar (at least from what I know about those alts) like Solana or Cardano are seeing as security.
I think SEC do not have a clear definition about which cryptocurrencies are securities or not, that is true. But according to recent news, SEC is declaring all cryptocurrencies except bitcoin as securities.
This is 2018 news:
https://cassels.com/insights/sec-declares-bitcoin-and-ether-as-non-securities/#:~:text=On%20Thursday%2C%20June%2014%2C%202018,Ether%20or%20Bitcoin%20as%20securities.
On Thursday, June 14, 2018, the U.S. Securities and Exchange Commission’s (SEC) Director of Corporate Finance, William Hinman (Hinman), announced that the commission would not be treating Ether or Bitcoin as securities.
From around 2020 but which I may not be exactly accurate about, SEC has been going tough on ether too. Or probably when it goes from proof of work to proof of stake.
Last year or early of this year, SEC sees ether too as securities which I have seen on the news many times. But Commodity Futures Trading Commission (CFTC) sees ether as a commodity.
https://cointelegraph.com/news/cftc-calls-eth-a-commodity-in-binance-suit-highlighting-the-complexity-of-classificationCFTC calls ETH a commodity in Binance suit, highlighting the complexity of classification. The suit claims Binance used Ether as a commodity in its financial products, experts explained, which says little about the basic nature of the coin.
But this is what I know about the SEC:
SEC lawsuits: 68 cryptocurrencies are now seen as securities by the SEC
https://cointelegraph.com/news/sec-labels-61-cryptocurrencies-securities-after-binance-suitSEC Chair Gary Gensler, however, has claimed that “everything other than Bitcoin” is a security that falls under the agency’s remit. Crypto data site CoinMarketCap lists around 25,500 cryptocurrencies in existence.
And truly, ether is a security.