The only question here is whether cryptocurrency is a security or a commodity. Securities fall under regulation by the SEC (SECURITIES and Exchange Commission). Commodities are regulated by the CFTC (COMMODITIES Future Trading Commission). SEC Chair Gensler agrees that Bitcoin is a commodity, but thinks everything else is a security.[1] Securities are much more tightly regulated than commodities. The SEC is making it clear with these complaints that they believe certain cryptocurrencies are securities.
A court might disagree. The CFTC could potentially disagree, although yesterday's agreement makes me think they may have given up on that to some extent. But I actually think it's pretty clear that any cryptocurrency project offering a reward for "staking" or similar is a security.
[1] https://www.axios.com/2022/06/28/bitcoin-is-the-only-coin-th...