US Bitcoin spot ETF sees $301.32m inflow on Sept 3, 2025

US Bitcoin spot ETF sees $301.32m inflow on Sept 3, 2025

US Bitcoin spot exchange-traded funds (ETFs) experienced a significant inflow on September 3, 2025, attracting $301.32 million in net inflows. This development marks a potential rotation back to Bitcoin after Ethereum dominated ETF flows throughout August. According to SoSoValue, Fidelity’s FBTC led the charge with $132.7 million in inflows, followed by BlackRock’s IBIT at $72.8 million [1].

In contrast, Ethereum products recorded $135.3 million in daily net outflows, weighed down by Fidelity’s FETH shedding $99.2 million and Bitwise’s ETHW losing $24.2 million [1]. Ethereum’s August surge, driven by yield-bearing staking, improving regulatory signals, and rising adoption by corporate treasuries, has given way to a more cautious September [1].

Historically, September has been a “cool-down” month for crypto, with Ethereum often underperforming due to weaker seasonal flows and lower risk appetite. Bitcoin, seen as the safer benchmark asset, typically regains inflows when volatility rises. This month’s trend aligns with this historical pattern, as global central banks signaling caution and bond yields holding firm have led investors to trim higher-risk Ethereum exposure in favor of Bitcoin [1].

Bitcoin’s dominance as an institutional treasury asset is evident in the weekly net inflows, which totaled 3,102 BTC (about $335.8 million) as of September 1, with Michael Saylor’s MicroStrategy adding 4,048 BTC worth $449 million on September 2 alone [1]. By contrast, Ethereum treasuries have lagged, with fewer corporate balance sheets disclosing significant ETH allocations despite August’s record price run-up [1].

Sharplink Gaming co-CEO Joseph Chalom warned that companies piling into Ether to squeeze out extra returns could expose themselves to cascading risks if markets turn. The sector could be tainted by imprudent actions, such as chasing high yields with ETH holdings [1].

As of late Tuesday, Bitcoin rose 0.55% to $110,943, while Ethereum slipped 1% to $4,327. Whether this marks the start of a sustained September rotation back into Bitcoin or just a short-term rebalancing remains the key question hanging over crypto markets [1].

References:
[1] https://finance.yahoo.com/news/bitcoin-etfs-pull-332-7m-104009462.html