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Nic Carter

Nic Carter

Founding Partner at Castle Island Ventures, Castle Island Ventures

Personal website Castle Island Ventures website

Bio

Nic Carter is a crypto investor, researcher and entrepreneur best known as a Founding Partner at Castle Island Ventures and a co-founder of Coin Metrics. Before launching Castle Island, he worked at Fidelity Investments as its first cryptoasset analyst, researching public blockchains and cryptoasset markets. Coin Metrics emerged in 2017 from an open-source effort — co-founded with software engineer Aleksei Nokhrin — to improve the measurement and analysis of public blockchain networks, and later developed into institutional-grade crypto data infrastructure. In 2018, Carter and fellow Fidelity alum Matt Walsh founded Castle Island Ventures, an early-stage venture firm investing at the intersection of public blockchains and traditional financial infrastructure. Carter has also become a prominent researcher and writer on Bitcoin, stablecoins, Proof of Work, blockchain economics and crypto market structure, and co-hosts the On The Brink podcast. His current personal biography notes that Coin Metrics was acquired by Talos Trading in 2025.

Profile at a glance

Country
USA
Status
Active

Work & Project Background

  • Coin Metrics

    Co-Founder

  • Castle Island Ventures

    Co-Founder

Key Contributions

Coin Metrics

Co-founded a crypto data and analytics platform focused on measuring public blockchains and digital asset markets, originating as an open-source project in 2017.

Castle Island Ventures

Co-founded the early-stage venture firm investing at the intersection of blockchain infrastructure and traditional financial services, launched in 2018 with Matt Walsh.

Blockchain Measurement

Helped popularize more sophisticated methods for analyzing on-chain economic activity, including work on realized capitalization and adjusted transaction volume.

Bitcoin Research

Produced influential research and commentary on Bitcoin economics, mining, Proof of Work and energy, contributing to public understanding of Bitcoin's monetary and security properties.

Stablecoin Research

Published extensive work on dollar-backed digital assets, payments and emerging-market adoption, including ground-up studies of stablecoin payment businesses.

Timeline

Education
Earned an MA in Philosophy from the University of St Andrews and an MSc in Finance and Investment from the University of Edinburgh.
Fidelity Investments
Served as Fidelity's first cryptoasset analyst, researching public blockchains, cryptoasset markets and blockchain data. (Matt Walsh, his future Castle Island co-founder, was simultaneously a Vice President at Fidelity leading the firm's blockchain and cryptoasset initiatives.)
2017
Co-founded Coin Metrics with software engineer Aleksei Nokhrin as an open-source project focused on bringing transparency to blockchain economic data and network metrics.
2018
Co-founded Castle Island Ventures with Matt Walsh. Both left Fidelity to launch the Cambridge, MA-based early-stage venture firm investing in companies building at the intersection of public blockchains and traditional financial infrastructure.
2018–present
Led Castle Island Ventures through multiple funds, including a third fund reported at approximately $250 million targeting startups in monetary network, financial services and internet architecture categories. Continues as Founding Partner as of August 2026.
2020s
Published influential research and commentary on Bitcoin economics, Proof of Work, Bitcoin mining and energy, stablecoins (including "Stablecoins: The Emerging Market Story" and "Stablecoin Payments from the Ground Up"), and crypto banking access. Co-hosts the On The Brink podcast with Matt Walsh.
July 16, 2025
Talos, the institutional crypto trading technology provider, announced its acquisition of Coin Metrics — creating an integrated data and investment management platform for digital assets. The deal closed at over $100 million according to reporting. Coin Metrics' brand continues as part of Talos.
August 2026
Continues as Founding Partner at Castle Island Ventures, co-host of On The Brink, and an active researcher and writer on Bitcoin, stablecoins, mining and crypto policy. Coin Metrics is now a founder-history relationship following the Talos acquisition; no current operating role at Coin Metrics has been publicly established.
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