An influential crypto trader believes that if a spot Ethereum (ETH) exchange-traded fund (ETF) is approved in the United States, it could lead to a significant surge in altcoins. The trader, known as the Flow Horse, shared this prediction with his 216,300 followers on the social media platform X. He suggests that if an ETF for ETH is approved, the crypto markets will become even more volatile. The Flow Horse also mentions that Dogecoin (DOGE) has been performing well lately. At the time of writing, DOGE is trading at $0.169, with an increase of nearly 11% in the past 24 hours. The Flow Horse also draws attention to the Ethereum open interest chart, describing it as “pretty wild.” He suggests that some traders may want to reduce their leverage due to the market conditions. At the time of writing, ETH is trading at $3,749, with an increase of nearly 20% in the past 24 hours.