Cathie Wood Says Investors Must Now Track AI Agents, Not Only Developers

The Agent Economy Moves to Payments

Cathie Wood told the Robinhood Summit in Houston that investors who have long watched developers to read where technology is heading will increasingly need to watch AI agents as well. The ARK Invest chief executive was pointing to software that carries out tasks on a user's behalf, from booking services to completing purchases, a step beyond the assistants most people use today. Her argument was that the buying decisions those agents make could become a leading indicator of where demand moves next.

The remark lands as AI agents shift from answering questions to executing transactions and payments of their own. That change has accelerated the argument over which financial infrastructure such systems will run on. A prominent view in the sector holds that stablecoins and blockchain-based networks could take on a significant role when machines buy data, computing power and other digital services in a format built for them.

Wood cast the shift as a monitoring problem. Companies are racing to build agentic systems that handle autonomous tasks, and if millions of agents start choosing the software, services and networks they pay for, those picks become a direct read on where demand is heading. Investors have historically followed the people writing the code; the agents themselves are the newer variable. The practical edge of her thesis sits in payments: an agent that can pay for what it needs without waiting for a human to approve each step changes how often transactions occur and on which rails they clear.

Open Networks or Closed Platforms

Joseph Chalom, co-chief executive of SharpLink and formerly BlackRock's head of digital assets, argued that the financial system AI agents will use should not be left to a small group of banks, payment companies or technology platforms. In his view, a world filled with intelligent agents only keeps its meaning if a handful of companies do not decide where the money goes. The core question, he said, reaches well beyond whether an agent can pay at all: how much authority a user grants the agent, how that authority can be revoked, and how the resulting transactions are audited will prove decisive. He offered a concrete case, noting a user might allow an agent to spend up to $500 on a hotel reservation without that granting unlimited account access.

Portability was his second demand. Users should be able to move their agents between different financial service providers, and an agent's credentials, financial data and permissions should not be locked inside one closed system. Open blockchains such as Ethereum, Chalom argued, could serve as a shared financial network for different agents, applications and companies, letting software move money directly over a common rail rather than each AI company building its own closed payment stack.

BlackRock engaged the same question in a paper published in September, examining the intersection of AI and digital assets. The firm noted that an agent paying for an API call, buying data or renting compute power can complete those steps without human approval each time, and said stablecoins and blockchain-based protocols could handle such payments. Coinbase's x402 standard targets machine-to-machine payments for online services such as data and API access. Coinbase chief executive Brian Armstrong said on X that Grok is currently the leading agentic client transacting on Coinbase, while sharing no figures. The crypto ecosystem is not alone here: Stripe, Google, OpenAI and Visa are also building solutions that let agents make purchases, and BlackRock expects traditional payment systems to keep their importance.

Where Agent Payments Clear Next

For COINOTAG, the decisive test is which rails agents actually choose, and that choice is measurable in payment volumes rather than statements. BlackRock's own paper expects traditional payment systems to retain their weight, so the split between open blockchain networks and closed platforms will show up in where machine payments clear, not in white papers. Armstrong's Grok claim arrived without figures, and until venues disclose agentic transaction volumes, stablecoin and blockchain usage in this segment rests on assertion. The proof point to watch next is disclosed data on how many agent payments each network handles.