According to Crypto Rover, Bitcoin ETFs reported a significant outflow of $616.1 million, while Ethereum ETFs saw an inflow of $70.2 million on May 31, 2025 (source: Crypto Rover Twitter). This shift indicates investors are rotating capital from Bitcoin to Ethereum, potentially reflecting changing sentiment and rising interest in Ethereum-based assets. For traders, this movement signals possible short-term volatility in Bitcoin prices and renewed momentum for Ethereum, which could impact crypto trading strategies and portfolio allocations.