The recent explosion of stablecoins wasn't due to a new financial innovation, but the maturation of underlying blockchain infrastructure. Cheaper and faster transactions on Layer 2 solutions and improved Layer 1s finally made large-scale, low-cost payments practical for real-world use.

As AI agents proliferate, they will need a way to transact. They can't open traditional bank accounts due to human-centric KYC rules. Brian Armstrong argues they will use stablecoin wallets instead, making stablecoins the financial rails for an explosive new category of "agentic commerce" and machine-to-machine payments.

Instead of funding another stablecoin protocol, the more viable investment is in the tooling layer. This includes payment systems, SDKs, and accounting software (like triple-entry bookkeeping) that enable small businesses globally to integrate stablecoin payments into their existing fiat workflows.

After failing to convince U.S. consumers to use stablecoins for everyday payments, crypto companies like Coinbase are pivoting. They now see programmatic, machine-to-machine transactions by AI agents as a more promising path to drive mainstream adoption of stablecoins and their underlying blockchains.

Beyond regulatory clarity, a critical hurdle for enterprise adoption of stablecoins is their accounting treatment. The Financial Accounting Standards Board (FASB) is currently deciding if stablecoins can be classified as cash equivalents on a balance sheet, a move that would significantly lower friction for corporate use.

Stablecoins uniquely combine speed (<1 second), low cost (<0.1 cent), and global reach. This positions them to dominate global payments, outperforming traditional systems like Swift (slow, costly) and credit cards (high fees), especially for B2B cross-border transactions where friction is highest.

Despite promising instant, cheap cross-border payments, stablecoins lack features critical for corporate treasurers. The absence of FDIC insurance, a single standard ("singleness of money"), and interoperability between blockchains makes them too risky and fragmented for wholesale use.

Instead of disrupting the established SWIFT network, Japan's stablecoins are positioned to work alongside it. They offer a parallel system for faster, cheaper transactions, potentially reducing fees by up to 80%, while leveraging SWIFT's existing trust and compliance frameworks for broader adoption.

While stablecoins gain attention, tokenized deposits offer similar benefits—like on-chain transactions—but operate within the existing, trusted regulatory banking framework. As they are simply bank liabilities on a blockchain, they may become a more palatable alternative for corporates seeking efficiency without regulatory uncertainty.