According to the source, US spot Bitcoin ETFs launched in 2024 attracted significant cumulative inflows, and strong-inflow days aligned with positive BTC performance concentrated in US trading hours, source: issuer flow disclosures from BlackRock iShares and Fidelity, and Kaiko US session return analysis. CME Bitcoin futures open interest and volumes reached multi-year highs in 2024, signaling larger institutional participation and liquidity migration to regulated venues, source: CME Group. The share of BTC returns accruing during US hours rose after ETF approval, while Asia and Europe contributed less to net returns, underscoring US institutional influence on intraday price discovery, source: Kaiko. Weekly digital asset investment product reports identified the US as the primary driver of net inflows in 2024, linking regional fund flows to broader market momentum, source: CoinShares Digital Asset Fund Flows. ETH price action intensified around US regulatory milestones, including spot ETH ETF approvals and subsequent launch flows in 2024, aligning with shifts in institutional positioning, source: SEC orders and issuer disclosures. For trading, monitor daily US ETF net flows at the close, CME futures basis and open interest changes, and US-session liquidity depth to confirm trend strength in BTC and ETH, source: issuers, CME Group, and Kaiko.