For years, stablecoins have lived in a linguistic limbo: too technical for dinner-table conversation, too “crypto” for corporate treasurers, too financial for most developers. They were either framed as a shadowy cousin of digital dollars or reduced to a trading tool for moving collateral between exchanges. But as the conversation in the latest episode of Bitcoin, Fiat & Rock and Roll makes clear, stablecoins are exiting their adolescence. They’re becoming infrastructure—the kind that doesn’t announce itself, the kind that only gets noticed when it breaks.
Max von Wallenberg, now building stablecoin infrastructure at scale under MoonPay, speaks with the calm of someone who has watched financial systems fail in real time. His career began on the trading floor at Lehman Brothers in oil and gas, brushing up against the crisis not as a history lesson but as a lived operational reality. From there came Harvard Business School, entrepreneurial detours, a stint leading regulated crypto market infrastructure at Börse Stuttgart Digital Exchange, and eventually a return to the foundational question that keeps pulling builders back: how does money actually move?
The End of “Crypto” as a Use Case
In the popular imagination, crypto is still often presented as a product category. In Wallenberg’s framing, it’s closer to a set of rails—a settlement layer that can carry many different types of economic activity. That distinction matters. When a technology becomes a rail, the winners are rarely the loudest evangelists. They are the operators who make it boring.
That’s the quiet thesis of his work: the stablecoin era won’t be won by slogans about decentralization, but by the ability to abstract away complexity for the people who don’t want to think about crypto at all. In practice, that means building APIs that treat developers like end users — not as an afterthought, but as the customer. It’s a reversal of the old banking hierarchy, where the user was tolerated and the system was sacred.
There’s a subtle cultural shift embedded here. Many fintech products succeeded not because they were radically new, but because they were emotionally legible: simpler screens, fewer steps, less friction. Wallenberg argues that the same UX expectations are now creeping into institutional finance. People who live with good consumer interfaces begin to demand similar clarity from corporate tools. Stablecoin infrastructure, in this view, isn’t merely a technical layer. It’s a product philosophy.
The Hard Part Isn’t On-Chain
It’s tempting to imagine stablecoins as a clean escape from the slow, balkanized world of banks. But the episode is most revealing when it insists on the opposite: the hardest work is still fiat.
Wallenberg describes IRON—the stablecoin infrastructure company he built and later sold to MoonPay—as a kind of compression engine. What used to require multiple banking relationships, regional payment providers, and months of stitching together inconsistent systems is bundled into a single interface. A flagship example is a “virtual accounts” product: a user receives a virtual IBAN or account number, sends a transfer via familiar rails (SEPA Instant in Europe, for instance), and the funds are automatically converted into stablecoins and delivered into a wallet.
It sounds seamless because, from the outside, it is. From the inside, it’s a logistical grind: different banks with different compliance standards, fragmented payment networks, region-specific quirks, and the constant need for redundancy. In other words, the work resembles modern correspondent banking—except the ambition is to make it feel like software.
That’s the paradox stablecoin builders keep running into: crypto is global by design, but fiat remains stubbornly local. Any company trying to serve an international user base has to reconcile those two truths every day.
Why Being DeFi-Native Still Matters
One of the more pointed arguments in the conversation is that stablecoin payments cannot be built as if they were traditional payments with a blockchain wrapper. Wallenberg is skeptical of approaches that arrive from the “payments world” and treat on-chain money as a new database. The trading-centric origin of stablecoins—still the dominant use case by volume—created its own norms, risk models, and market structures.
To build for payments, he suggests, you need to understand the DeFi-native realities first: liquidity fragmentation, the importance of minimizing “hops,” and the operational weirdness of on-chain settlement. This is where his background in trading becomes more than biography. It’s a worldview. The payment future, he implies, is being written by people who respect the logic of markets—not just the logic of compliance.
That framing becomes especially relevant when the conversation turns to new entrants: Stripe-adjacent efforts, new payment-optimized chains, and heavily funded plays that promise to modernize stablecoin settlement. Wallenberg’s read is blunt: much of this is go-to-market, not technological necessity. High-throughput chains already exist. What new networks often buy with funding is distribution — partnerships, incentives, early adoption. The winners aren’t necessarily the best engineers; they’re the best closers.
Regulation: Not the Villain, Not the Savior
For years, regulation was portrayed as the main obstacle. In practice, it is becoming something else: the cost of admission.
Wallenberg describes the post-acquisition advantage of MoonPay’s regulatory stack—a web of licenses and compliance infrastructure that would have taken years to assemble alone. But he is also careful not to romanticize the regulatory moment. Rules evolve, political pressure reshapes policy, and enforcement can remain inconsistent even under headline frameworks like Europe’s MiCA. In the United States, debates about whether yield can be paid on stablecoin balances reveal how quickly the ground can shift.
If there is a recurring theme here, it’s that stablecoins are now less limited by ideology than by governance. Big companies won’t move serious flows onto rails they cannot explain to auditors and boards. The technology can be ready; the institutional permission structure has to be ready too.
The Stablecoin Future Might Stop Saying “Stablecoin”
The most telling part of the discussion comes near the end, when Wallenberg is asked what will feel outdated in two years. His answer is less prediction than inevitability: that we will stop calling these instruments “stablecoins” at all. They will be referred to simply as money, with the underlying rail—blockchain—fading into the background.
It’s a familiar arc. Successful technologies shed their brand names and become invisible. People stopped “going online.” They stopped “doing e-commerce.” They just did things.
If that happens, the stablecoin revolution won’t look like a revolution. It will look like a user sending dollars across borders instantly, at low cost, without thinking about correspondent banks, settlement windows, or where the liquidity sits. The triumph will be a kind of silence.
And the builders who win will likely be those who, like Wallenberg, are less interested in the romance of disruption than in the unglamorous craft of plumbing. Because in finance, as in cities, the systems that matter most are the ones you only notice when they fail.