Banks are shifting tokenized cash plans toward interoperable onchain rails

A more practical version of the tokenized money thesis is starting to take shape in Europe. Instead of waiting for one instrument to dominate, banks and institutional clients are increasingly organizing around a mixed model in which stablecoins, tokenized deposits and tokenized cash funds can all circulate on compatible infrastructure. That is the significance of Sygnum’s latest argument on banking rails: the market is moving away from a winner-take-all stablecoin narrative and toward an interoperable cash stack built for treasury operations, settlement and regulated market access.

The original reporting hook came from Sygnum’s view that institutional clients want multiple tokenized cash instruments to work together on a single platform rather than choosing one format in isolation. In that framing, the issue is no longer whether a stablecoin can exist beside a tokenized deposit or a money market fund token. The issue is whether banks can support all three with enough compliance, identity controls and transfer certainty to make them usable in real financial workflows. That is a meaningful change from the earlier cycle, when many tokenization pilots were siloed, private and disconnected from broader onchain liquidity.

Sygnum’s own January outlook helps explain why the bank thinks this shift is arriving now. In its 2026 Sygnal report, the firm said token rails were moving from parallel experimentation toward the default financial stack, with banks, exchanges and custodians embedding token-based custody, issuance and settlement into core operations. That assessment matters because it treats tokenized money as infrastructure, not as a standalone product category. Once institutions begin integrating these rails into treasury, trading and risk management, interoperability stops being a feature request and becomes a prerequisite. A closed system can demonstrate technology; it cannot easily support cross-institutional liquidity.

The clearest concrete evidence is Switzerland’s CHF stablecoin sandbox, announced in April by UBS, PostFinance, Sygnum, Raiffeisen, Zürcher Kantonalbank, BCV and Swiss Stablecoin AG. According to the participating institutions, the sandbox is designed to test use cases for a Swiss franc stablecoin in a controlled live environment with defined safeguards, limited participants and transaction limits. The stated objective is broader than a single token launch. The group says it is exploring how to connect blockchain applications with the Swiss franc while strengthening the domestic digital money ecosystem and the competitiveness of Switzerland’s financial center. That is the language of market plumbing, not marketing.

The sandbox also shows why banks are drawn to models that are open enough to connect with onchain applications but structured enough to preserve supervision. Public blockchain access offers connectivity to tokenized assets, liquidity venues and programmable workflows that private ledgers often fail to reach. At the same time, banks still need permissioning layers, compliance checks and operational controls that fit prudential expectations. A public-yet-governed approach attempts to combine those two priorities. It is less ideologically pure than open crypto networks and less isolated than closed consortium chains, which is exactly why it may be more useful for regulated capital.

This is also where tokenized deposits re-enter the conversation. Banks are unlikely to rely only on third-party stablecoins if they believe their own deposit liabilities can be represented onchain with familiar legal treatment and stronger links to client balances. But they also know that clients increasingly want access to multiple forms of digital cash, including transferable stablecoins and yield-bearing tokenized fund products. In that environment, the winning strategy may not be issuing a single bank token. It may be becoming the institution that can custody, settle and orchestrate movement across several cash formats without forcing clients to leave regulated channels.

For RWA markets, that matters because tokenized securities and funds need a cash leg that is as programmable as the asset leg. If every onchain product settles into a different walled garden, secondary trading, collateral mobility and cross-platform treasury management remain limited. If banks succeed in building interoperable tokenized cash rails, they make it easier for money market funds, private market instruments and other RWAs to plug into the same operating layer. The story here is not that one new stablecoin will win Europe. It is that regulated institutions are finally designing tokenized money infrastructure as shared market plumbing instead of isolated pilot inventory.