According to previous disclosures by Fortune magazine, the U.S. Securities and Exchange Commission is launching an aggressive legal action to classify Ethereum as a security. According to the latest news from "Fortune", according to sources, the US Securities and Exchange Commission's investigation of Ethereum may be related to its shift to the PoS proof-of-stake model in 2022, but analysis said that the shift to the proof-of-stake model may not be the reason why the US Securities and Exchange Commission is investigating Ethereum. There may be strong arguments or other factors. Additionally, if Ethereum comes under the SEC’s securities laws, it could impact second-layer blockchains like Polygon. (Fortune)