Bitcoin vs. Ethereum ETFs: Which Has More Room to Grow in 2026

Bitcoin ETFs just recorded their strongest single-day inflow in months, but Ethereum has been quietly outpacing it on both flows and price gains for most of 2026. The real question is whether either asset can hold its edge through the…

Bitcoin (CRYPTO:BTC) spot ETFs attracted $3.8 billion in net inflows from August 18 to September 5, 2026, including $731 million on September 3, the biggest single-day inflow since January 14. Another $174.6 million came in on September 4, while Ethereum (CRYPTO:ETH) spot ETF inflows slowed sharply over the same period.

Ethereum spot ETFs still lead the 2026 flow race, with roughly $863 million in net inflows compared with about $1 billion in net outflows for Bitcoin spot ETFs. Price performance points in the opposite direction, with Ethereum up 33.04% from August 11 to September 10, compared with Bitcoin’s 22.96%, leaving a clear split between which asset is attracting ETF money and which has delivered the stronger recent price performance.

Bitcoin Is Closing the ETF Gap

Bitcoin’s September inflows are starting to narrow the gap with Ethereum, with $731 million entering spot ETFs on September 3, the group’s strongest single-day result since January 14, followed by another $174.6 million the next day. That sustained buying stands in contrast to Ethereum, where weekly inflows fell sharply before the funds recorded their first net outflow since August 11 on September 8.