In the past 24 hours, the altcoin king Ethereum (ETH) surged by 20% due to news of a significantly increased likelihood of spot Ethereum ETF approval. Following the U.S. Securities and Exchange Commission (SEC) urging issuers to expedite their 19b-4 filings, the probability of this approval rose from 25% last week to 75%. This development not only strengthened Ethereum’s main network asset ETH but also triggered a broader rally among altcoins within the Ethereum ecosystem.