🎙️ Ep. 73. Will AI Agents Use Stablecoins or Virtual Cards?

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This week on Tokenized Ep. 73, Simon Taylor and Cuy Sheffield are joined by Tanner Taddeo, CEO & Co-Founder of Stable Sea, and Alfonso Gómez-Jordana Mañas, Co-Founder of Crossmint. Tanner brings an enterprise lens - Stable Sea serves legacy companies with global subsidiaries, providing stablecoin treasury infrastructure and cross-border payment solutions. Alfonso comes from the agentic commerce frontier - Crossmint has been building payments infrastructure for AI agents and recently launched AI agent-exclusive virtual cards powered by Visa Intelligent Commerce.

Recorded live in San Francisco during what can only be described as stablecoin week.

🎙️Listen to the full episode here on your favorite podcast app or 📷 watch on YouTube.

We cover:

• Why stablecoin-linked cards are in "hyper growth mode" across 100+ countries

• How virtual cards - not stablecoins - are winning the AI agent payments race (for now)

• The vibe coder as the new merchant: why stablecoin acceptance is becoming the norm for a category of seller that didn't previously exist

• Morgan Stanley's National Trust Bank application and what it signals about institutional on-chain strategy

• Kraken's path to a Fed payments master account and shifting fintech market structure

• Why "crypto" as a binary risk category is becoming untenable for banks

• The enterprise treasury management use case everyone keeps forgetting

Key Takeaways 

Will AI Agents Use Stablecoins or Virtual Cards? The short answer, according to this week's guests: both - but not the way you'd expect. The agentic commerce debate has been framed as stablecoins vs. cards, but the reality on the ground is more nuanced. As Alfonso Gómez from Crossmint put it, "we started serving the agent tech finance ecosystem a year ago... at the beginning we started thinking it just will be stablecoins for everything. And then we hit the market with it... and realized that was not what people were looking for."

Stablecoin-Linked Cards: Table Stakes, Not a Feature

Visa's expansion of its Bridge partnership to over 100 countries is the headline, but the real story is the business model forming underneath. As Cuy Sheffield noted, "if someone goes and takes your wallet and scans a QR code and pays directly with a merchant, those funds just left your platform and you didn't make any money from it." Cards solve that - they monetize via interchange while giving consumers tap-to-pay everywhere.

Alfonso confirmed that "half of the customers we work with have a stablecoin-linked card as well - neobanks, remittance companies."

The two fastest growing use cases? B2B and stablecoin-linked cards.

AI Agent Payments: Cards First, Stablecoins Where It Matters

This was the most striking part of the conversation. Despite the x402 discourse pushing stablecoins as the default agent payment layer, Crossmint is seeing "tremendously more demand for virtual cards coming directly from a linked card on file, than the other way around."

The logic is straightforward - consumers want their credit card points, they want familiar balances, and agents can be delegated virtual cards with spend limits via Visa Intelligent Commerce.

Cuy Sheffield reframed the value proposition: "Vibe coding has changed a lot of the conversation about agentic commerce... the value prop to the consumer of agentic commerce is less about saving time, and it's more about creating value or creating money." The concept of "command line commerce" - delegating a payment method to an agent within a contained coding environment - is where Visa sees the opportunity.

Where do stablecoins fit on the merchant side? Simon Taylor offered the clearest rubric: "Who's that merchant, and what are they selling, and how mature are they?" For vibe-coded microservices where the creator can't yet pass traditional merchant onboarding, stablecoins are becoming the fastest path to accepting payments. Alfonso compared this to Stripe's early days - "we're building for a customer that doesn't exist yet."

The Institutional Land Grab: Charters, Master Accounts, and the End of "Crypto" as a Risk Category

Morgan Stanley applying for a de novo National Trust Charter to custody crypto isn't just about trading Bitcoin on E*Trade. As Tanner Taddeo observed, "the one signal that is emerging that is absolutely clear is that on-chain financial services are here to stay, and all the banks and neobanks are posturing for the right regulatory status."

Cuy Sheffield added that demand from large FIs has moved well beyond crypto trading - "it's tokenizing securities, it's using tokenized assets as collateral, it's on-chain lending... it's actually the core guts of the product that they're in the business of offering."

Kraken becoming the first to receive word from the Kansas Fed on a payments master account is equally significant. Cuy Sheffield pointed out that this breaks two long-held fintech assumptions: the binary of "you're a fintech or you're a full bank," and the impossibility of getting a master account. "Those are just two operating assumptions that every fintech entrepreneur had to just live with... the reality is the assumptions now have changed."

Enterprise Treasury: The Use Case Everyone Keeps Forgetting

While agentic commerce dominates the discourse, there's a quieter but arguably larger opportunity in enterprise treasury management. As Tanner Taddeo from Stable Sea explained, "there's a lot of efficiency gains in the treasury space for large merchants, mid-market merchants... both on the asset management side, on how you manage your free cash flow, and then on your supplier payments and on your treasury movements."

Stable Sea's platform lets enterprises use stablecoins for cross-border treasury movements, access tokenized money market funds, and  soon  onchain lines of working capital. The agentic play here isn't consumer-facing commerce; it's an AI agent serving as "your de facto Chief of Staff to the CFO," managing treasury across multiple subsidiaries, converting between Argentine peso, South African rand, and US dollars, parking idle cash in yield-bearing instruments, and pulling it back when needed.

As Simon Taylor framed it: "We have the stablecoin-linked card and the consumer and the business use case, but you also have the treasury management use case. And those are the two big ones that we keep coming back to."

The End of "Crypto" as a Binary Risk Category

One of the most consequential shifts discussed this episode isn't a product launch - it's how institutions categorize risk. Simon Taylor laid out the history: "If you were a fintech and you wanted to offer financial services, you go to one of the sponsor banks... and the sponsor banks were clear that you're either a crypto institution or you're not." That binary created a restricted category where companies would simply say, "we do not do crypto" - without any legal definition of what "crypto" actually meant.

Cuy Sheffield added critical context: "Part of this was a function of the speculative hype cycles of crypto... it was like 2017, whoa, everyone's buying crypto, what do we do? 2021, whoa, everyone's buying crypto, what do we do? And so there was this very quick reactionary - this is scary, this is risky. And then crypto became a category, literally just crypto. And then crypto became a restricted category."

That binary is now breaking down. As Simon put it, "saying you use crypto technology these days is a little bit like saying you use the internet - who doesn't?"

Institutions are being forced to move from blanket restrictions to nuanced risk frameworks - distinguishing between custody, stablecoin payments, tokenized securities, and speculative trading as distinct risk profiles rather than a single bucket.

What's Next

The convergence is accelerating. Crypto companies are applying for bank charters and master accounts, while traditional financial institutions like Morgan Stanley are seeking national trust charters to custody digital assets. As Tanner Taddeo put it, "all the banks and neobanks are posturing for the right regulatory status so that they can crush the arb." The institutions winning this next phase will be those that can navigate both rails - cards and stablecoins, traditional charters and on-chain infrastructure - rather than betting on one at the exclusion of the other.

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