Five Fault Lines That Will Decide the Future of Stablecoin Policy

Two years ago, stablecoin policy was mostly a debate about whether governments should act at all. That debate is over. The EU has had rules in force since mid-2024, the United States enacted the GENIUS Act in July 2025, and Hong Kong, Singapore, Japan and others have their own frameworks. What remains is less glamorous and more consequential: turning statutes into supervision, resolving turf wars and deciding how private digital dollars coexist with public money. Here are the fault lines worth watching.

1. Implementation in the United States

The GENIUS Act left a great deal to regulators. The Treasury, the Federal Reserve, the OCC and state supervisors have to define capital and liquidity standards, specify how reserves are held and custodied, set the comparability test for foreign regimes and write the anti-money-laundering expectations for issuers. The statute's clock is also ticking: its provisions take effect either 18 months after enactment or 120 days after final rules, whichever is earlier, which puts the start of the fully regulated era in the near term. How strict those rules turn out to be will determine whether the market consolidates around a handful of bank-affiliated issuers or stays open to fintech and crypto-native firms.

• How the comparability test treats offshore issuers serving US users.
• Whether state regimes are judged 'substantially similar' in practice or only on paper.
• How the ban on issuer-paid interest is applied to exchange 'rewards' programs.

2. Europe's answer to the dollar token

European officials have made little secret of their unease at the prospect of dollar stablecoins becoming the default settlement asset on public blockchains used by European firms. Their response runs on two tracks. One is the digital euro, which the ECB has continued to prepare while EU lawmakers debate the enabling legislation. The other is private: euro-denominated e-money tokens issued under MiCA, including a consortium of European banks that announced plans for a euro stablecoin last year. So far, euro tokens remain a small fraction of the market. Whether that changes depends on whether European banks and fintechs can offer something that is as easy to integrate as the dollar incumbents.

3. Asia's licensing race

Hong Kong's stablecoin ordinance has been in force since August 2025, and the Monetary Authority has signaled that it will grant only a small number of licenses. The city's ambition is to be a regulated hub for tokenized finance, including tokens pegged to the Hong Kong dollar and potentially other currencies. Singapore and Japan offer alternative models with their own emphasis on bank involvement and consumer protection. Mainland China, which bans crypto trading domestically, watches these experiments closely because offshore yuan-linked tokens would touch sensitive questions of capital controls. The competition is not only for business; it is over which standards become templates for others.

4. The yield war

Of all the unresolved questions, the fight over yield may be the most economically important. Banks want a strict ban on anything that looks like interest on stablecoin balances, whether paid by the issuer or by an affiliated platform, because they fear deposit flight. Crypto firms argue that sharing reserve income with users is a legitimate competitive feature. Whichever side prevails will determine whether stablecoins remain narrow payment instruments or become an alternative savings vehicle with implications for credit creation in the wider economy.

The quiet question behind every stablecoin rulebook is who gets to earn the interest on the world's digital cash.

5. Run risk and the Treasury market

As stablecoin reserves grow, their link to the market for short-term US government debt becomes more significant. In calm times that is an advantage: a steady new buyer. In stress, it could be a vulnerability if a large issuer had to liquidate bills quickly to meet redemptions. Central banks and international bodies such as the Financial Stability Board and the BIS have flagged this repeatedly. The practical questions are whether issuers get access to central bank liquidity in a crisis, and whether supervisors run regular stress tests on redemption scenarios.

There is a related concern about concentration. A small number of issuers account for the overwhelming majority of stablecoins in circulation, and they rely on a limited set of banks and custodians for their reserves. That creates single points of failure that look more like the plumbing of the traditional financial system than the decentralized ideal crypto advocates once promised. Supervisors are likely to push issuers to diversify custodians, hold more same-day liquidity and publish clearer redemption procedures. Issuers, for their part, will argue that over-engineering safety erodes the thin margins that make the business viable when interest rates fall.

The bigger picture

Stablecoins have become an instrument of financial statecraft almost by accident. The United States sees them as a way to extend dollar reach; Europe sees a risk to its monetary autonomy; Asian financial centers see a business opportunity bounded by political caution; emerging markets see both a lifeline for citizens and a leak in their monetary systems. The next phase will be decided in technical rulebooks rather than headline-grabbing votes, which is exactly why it deserves close attention. Nothing here is investment advice, but anyone holding, building or regulating digital money will feel the outcome.