Best Spot Bitcoin ETFs Comparison 2025

Head-to-head analysis of the top four spot Bitcoin ETFs: IBIT, FBTC, GBTC, and ARKB (data as of December 16, 2025).

Key Metrics Comparison

Metric	IBIT (BlackRock)	FBTC (Fidelity)	GBTC (Grayscale)	ARKB (ARK/21Shares)
Expense Ratio	0.25%	0.25%	1.50%	0.21%
Approx. AUM	$72B+	$23B+	$18B+	$8B+
Liquidity / Volume	Highest	Very High	High	Good
Recent Flows (Dec 2025)	Mixed (leading on positive days)	Mixed	Outflows	Positive / Neutral
Custodian	Coinbase	Fidelity (in-house)	Coinbase	Coinbase
Best For	Liquidity & size	Fidelity users	Legacy holders	Lowest long-term costs

Quick Verdict

Best Overall / Most Popular: IBIT – Dominates in AUM, liquidity, and trading volume.
Best for Fidelity Customers: FBTC – Seamless integration and strong performance.
Lowest Fees: ARKB (0.21%) – Ideal for long-term holders focused on minimizing costs.
Avoid Unless Legacy: GBTC – High 1.50% fee drives ongoing outflows to cheaper alternatives.

All funds provide nearly identical exposure to spot Bitcoin price (minus fees). The main differences come down to cost, liquidity, and issuer trust.

Links to individual reviews:

IBIT Details FBTC Details GBTC Details ARKB Details

← Back to Bitcoin ETFs Directory | All Comparisons →

Not financial advice. Data approximate as of December 16, 2025. Crypto investments are highly volatile. Always verify latest figures with issuers and conduct your own research.