Bitcoin ETF Dominance Holds Steady in 2025 as Ethereum Slowly Gains Ground

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Bitcoin remained the unequivocal institutional favorite in 2025, maintaining overwhelming dominance in the crypto ETF arena. Throughout the year, it consistently captured between 70% and 85% of the total crypto exchange-traded fund market share. This concentration underscores how institutional investors have largely treated Bitcoin as the primary gateway for cryptocurrency exposure, while remaining measured in their allocation to other digital assets.

The stability of Bitcoin’s ETF market share is notable, persisting even after the launch of several new alternative asset products. Combined flows into spot Bitcoin and Ethereum ETFs totaled $31 billion in 2025, highlighting substantial institutional demand. However, the distribution of this capital heavily favored Bitcoin, reinforcing its leading position.

This sustained institutional buying via ETFs has provided consistent price support for Bitcoin throughout the year, contributing to its relative outperformance compared to the broader crypto market. The flow concentration indicates that institutions often treat Bitcoin as a distinct asset class—viewing it more as a macro hedge or digital commodity—rather than lumping it in with the wider crypto sector.