Grayscale Bitcoin Mini Trust (BTC) - Lowest Fee Spot Bitcoin ETF

The ultra-low-fee alternative from Grayscale, designed to compete on cost. Strong growth as of December 18, 2025.

Key Facts (December 2025)

Issuer	Grayscale Investments
Ticker	BTC (NYSE Arca)
Expense Ratio	0.15%
Approx. AUM	$4B+
Custodian	Coinbase Custody
Inception Date	July 2024
Official Site	Grayscale BTC Mini Page

Recent Performance & Flows

• The Mini Trust has rapidly grown to over $4 billion in AUM thanks to its industry-leading low fee.
• December 2025 flows: Strong positive inflows, capturing capital shifting from higher-fee products (including legacy GBTC).
• Year-to-date: One of the fastest-growing Bitcoin ETFs, benefiting from cost-conscious investor rotation.
• Tracks spot Bitcoin price closely with minimal tracking error.

Data approximate; sources include issuer reports, ETF.com, SoSoValue (as of mid-December 2025).

Pros

• Lowest expense ratio in the category at 0.15% – maximizes long-term returns.
• Same trusted Grayscale management and Coinbase custody as larger products.
• Rapid AUM growth and increasing liquidity.
• Ideal for fee-sensitive investors seeking pure Bitcoin exposure.

Cons

• Smaller AUM than giants like IBIT/FBTC – may have slightly wider spreads during volatility.
• Newer product with shorter track record than legacy GBTC.
• Same underlying Bitcoin price and network risks as all spot ETFs.
• No direct Bitcoin ownership or withdrawals.

How to Buy BTC Mini Trust

Available on major brokers including Fidelity, Vanguard, Charles Schwab, Robinhood, and interactive brokers. Search ticker "BTC". Excellent low-cost option for long-term holders.

← Back to Bitcoin ETFs Directory | Compare with IBIT, GBTC →

Not financial advice. Investments in crypto ETFs involve high risk, including potential loss of principal. Data approximate as of December 18, 2025; always verify with official sources.