Christian Rau has spent his career at the intersection of traditional finance and emerging technology. As Senior Vice President of Digital Assets and Blockchain at Mastercard, he sits at the centre of one of the most consequential questions in payments right now: what role do stablecoins actually play in a network that already moves money across 210+ countries?
Dayana caught up with Christian live at Money20/20 Europe in Amsterdam for an episode of Payments Pulse, the show where WalletConnect Pay explores everything at the convergence of traditional and digital finance. The timing couldn't have been better. Hours before they recorded, Mastercard announced stablecoin-native settlement in Colombia on Solana, marking a significant milestone for on-chain infrastructure at card network scale.
In this episode, Christian breaks down why consumers don't need to care whether they're paying in fiat or stablecoins, where he sees the real settlement opportunity, how Mastercard thinks about the disruption question internally, and his take on regulation from MiCA to the GENIUS Act. He also shares where he thinks the stablecoin economy is heading over the next one to three years.
If you work in payments, this one is worth your time.
Full Transcript
Dayana: Welcome to Payments Pulse, where we discuss anything money and payments, from traditional finance to digital finance and the convergence of the two. Today we're here in Amsterdam at Money20/20 live with Christian Rau, SVP of Digital Assets and Blockchain at Mastercard. Christian, welcome to the show.
Christian Rau: Thanks for having me.
Dayana: Let's dive in. Stablecoins are one of the most talked-about topics right now, and yet everyday people are still paying in fiat. What does it actually take for stablecoins to become the dominant means of payment?
Christian Rau: The fact that people still use fiat comes down to how well the payments industry has evolved over the last sixty years. At this point, most people don't know, and frankly shouldn't need to care, whether they're paying in fiat or stablecoins. Our job is to enable safe, simple, secure payments at global scale. That started sixty years ago with imprinter cards, evolved through plastic with mag stripes and chips, and we've always done our best to abstract the complexity away. But if you lift the hood and look at how the underlying technology has evolved, it's been quite a journey. Stablecoins already play a role today, and they'll continue to drive innovation going forward.
Dayana: We keep hearing from guests that people don't need to see how the sausage is made. But when it comes to payment rails specifically, where do you see room for improvement?
Christian Rau: By and large, I wouldn't call it failure. It does vary by geography, and I'm not dismissing that financial exclusion exists in parts of the world. But sitting here in Amsterdam, Europeans have never had more payment options, especially online. The bigger shift is that the world is moving toward 24/7, real-time, everything at your fingertips. From a consumer perspective, that's already the reality. You tap your Mastercard on your phone and it's done. But if you look underneath at how money actually moves and how settlement works, there's definitely room to improve, whether that's removing time delays, reducing risk, or offering more choice.
Dayana: Cross-border payments always comes up as the headline use case for stablecoins. But what else is on your radar?
Christian Rau: From a Mastercard perspective, I see two distinct use cases. One is visible to the consumer, and one operates below the surface. On the consumer-facing side, we're seeing more fintechs allow people to spend digital assets directly, with all the legal and regulatory complexity abstracted away so those transactions meet the same standards as any fiat Mastercard transaction. Stablecoins play a role there in terms of what assets you can spend. The second use case, which is more under the radar, is using stablecoins for the settlement of card transactions. That helps money move more freely because right now settlement is largely tied to banking hours. Monday to Friday, 9 to 5, and whatever happens after that waits until the next day. Stablecoins help change that.
Dayana: On regulation, we've seen MiCA, we're hearing about the GENIUS Act. If you had to pick one piece of legislation as the most impactful, what would it be?
Christian Rau: It's a difficult one to call, and I want to be careful about commenting on specific regulation. What I'd say is that good regulation puts sustainable innovation first, consumer protection at the centre, and creates a level playing field. What that looks like will differ between the US, Europe, and Asia. That said, MiCA stands out to me. It was relatively early in the regulatory cycle for digital assets globally, and it spans a large group of quite heterogeneous countries. That's no small thing. So yes, MiCA is landmark regulation in my view.
Dayana: Here's a pointed one. Mastercard is both a potential beneficiary of stablecoin payments through settlement infrastructure and a potential target of disruption if stablecoins bypass card rails entirely. How do you think about that tension internally?
Christian Rau: Let me take the disruption piece first, because I hear it a lot and I have a strong view on it. Payments as a product is not just moving money from A to B. That's a necessary component, but it's not the essential one. What's essential is global interoperability. You can use your Mastercard anywhere in the world, South Africa, Vancouver, Hong Kong. It's about consumer protection. If something goes wrong, there's someone to call and you get your money back. So while stablecoins could be perceived as a threat to card rails, we have to be honest that cards offer an entire stack, interoperability, consumer protection, regulatory clarity, that goes well beyond the money movement itself. And cards have evolved substantially. It's not just plastic with a mag stripe anymore. Agents can now use Mastercard credentials. The innovation is being used to evolve what Mastercard does at scale.
On settlement specifically, yes, that's an obvious application. The industry does a good job of almost faking real-time payments. You tap, it says approved, but the money hasn't actually moved yet. Closing that gap between when a transaction happens and when money flows, that's where stablecoins add real value.
Dayana: Speaking of which, Solana just posted this morning that Mastercard is introducing always-on stablecoin settlement on Solana, covering 3.7 billion cards across 210+ countries. What can you tell us?
Christian Rau: That's accurate. We announced this morning that we conducted stablecoin-native settlement in Colombia, and we're equally excited about it. It won't require most consumers to think twice, but for the industry it's a meaningful step forward. We're using stablecoins to evolve a model we've been operating at scale for six decades, staying committed to global interoperability, safety, security, and choice for consumers and businesses.
Dayana: Final question. Where does the stablecoin economy go in the next one to three years?
Christian Rau: A lot of people have made predictions that didn't age well, so I'll keep this grounded. I believe stablecoins will play an increasingly important role in settlement. I also think we'll see more challenger bank-style apps that actively use stablecoins, whether visibly or not. And I believe AI agents will lean heavily on stablecoins for the settlement layer when they're conducting transactions on behalf of users.
Dayana: You heard it here first. Christian, thank you for joining us on Payments Pulse.
Christian Rau: Thank you, appreciate it.