David Marcus, CEO of Lightspark, used a Tuesday morning session at the Bitcoin 2026 Conference to announce Grid Global Accounts, a product he described as a dollar account that works everywhere, backed by a new partnership with Visa that extends spending access across many countries worldwide.

Marcus opened by framing the problem at scale. Roughly 400 billion emails travel across the internet each day, and consumers rely on a handful of platforms like Gmail to manage that volume. The global payments system moves 10 billion transactions a day, yet lacks an equivalent universal layer, Marcus said.

Marcus said there is no form of payment that works everywhere without friction, and…

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