W4 — Circle Arc blockchain: AI payments, CPN, and the $4T RWA play
W Insights · W4 · May 11, 2026 · ~9 min read
Circle Arc blockchain is the institutional Layer-1 that Goldman Sachs, Visa, and 100+ other institutions joined as testnet partners. Together with the CPN global payment network, $0.000001 AI-agent nanopayments, and EURC/USYC’s $4T RWA opportunity, this is Circle’s full play to escape Treasury-only dependence.
Series Part 4 · The Digital-Dollar Race in the AI Era (5-part series) · Previously: Part 1 “What is a stablecoin?”, Part 2 “Circle business model”, Part 3 “Circle financial statements decoded”
Established earlier in this series: Circle derives 96% of its revenue from U.S. Treasury interest, and more than half of that interest flows through to Coinbase. A 1-percentage-point Fed rate cut could shave roughly $441M off revenue (see the Circle filings on SEC EDGAR). The shape of the business today resembles a Treasury-bill ETF more than a software platform.
Circle’s management is well aware of this structural ceiling, and is actively engineering a transformation from “T-bill company” to “digital dollar infrastructure company.” This article unpacks the four core weapons of that transformation — Circle Arc blockchain, Circle Payments Network, AI nanopayments, and EURC/USYC.
📑 In this article
- Circle’s three-business-line structure — no longer just a USDC issuer
- Circle Arc blockchain — the institutional Layer-1 with 100+ partners
- Circle Payments Network — taking on global rails
- Nanopayments — the payment standard for the AI-agent era
- EURC, USYC, and the $4T RWA market
- New-business growth metrics, at a glance
1. Circle’s three-business-line structure — no longer just USDC
Circle’s own IR materials position the company as a “three-business-line digital dollar infrastructure platform”, not as a single USDC issuer.
① Circle Arc blockchain & developer infrastructure
A Layer-1 blockchain built in-house. The point isn’t only USDC — it’s the rails for moving real-economy activity (B2B payments, capital-markets trading, tokenized assets) on-chain. The testnet launched in October 2025, with Goldman Sachs, Deutsche Bank, Visa, Mastercard, and 100+ other institutions participating.
② Circle digital assets & services
Issuing and operating stablecoins and tokenized products: USDC, EURC, USYC. This is the core business covered in earlier installments — $75.3B USDC in circulation, €389M EURC, $1.7B USYC, all expanding rapidly.
③ Circle applications
The payments and remittance solutions that drive real-world usage: Circle Payments Network (CPN), StableFX (stablecoin FX trading), and Nanopayments (AI-agent payments).
Circle has acknowledged that USDC issuance alone cannot lift the company out of “T-bill company” territory. So it is expanding into the infrastructure USDC flows over (Circle Arc blockchain) and the applications that consume USDC (CPN, AI payments). If this succeeds, Circle gets re-rated as an IT platform — and a 99× P/E starts to look defensible.
2. Circle Arc blockchain — the institutional Layer-1 with 100+ partners
The Circle Arc blockchain is Circle’s own Layer-1, with testnet live since October 2025. Having historically issued USDC on chains built by others (Ethereum, Solana), Circle has now decided to build its own settlement layer.
Why an in-house chain?
When USDC trades on Ethereum, the gas fees go to Ethereum validators. On Solana, to Solana validators. Circle issues USDC but captures almost none of the transaction fees. For a company trying to reduce Treasury-interest dependence, that’s a hard cap on the revenue ceiling.
Once the Circle Arc blockchain mainnet ships, USDC transactions on Arc generate fees that Circle itself captures. The more USDC volume runs on Arc, the larger this revenue line becomes.
Partner list — surprisingly heavyweight
What makes this striking is that traditional finance heavyweights have chosen to plug into the Circle Arc blockchain rather than run their own Layer-1s. A line-up of this calibre joining a new chain hasn’t really happened since the early days of Ethereum. If Arc lands the mainnet successfully, Circle stops being a “USDC issuer” and becomes the “digital dollar standard infrastructure.”
Existing Layer-1 alternatives (Ethereum, Solana) are decentralized by design; Arc explicitly leans into institution-friendly + regulation-compliant as its core value proposition. KYC/AML are baked in, transactions are traceable — exactly the environment legacy banks want to use.
Korean payments firm Hecto Financial is on Arc’s testnet and has joined Circle Payments Network. That makes it very likely Korean enterprises will start running payments and remittance products on Circle infrastructure once Arc mainnet lands.
3. Circle Payments Network — taking on global rails
Circle Payments Network (CPN) is a stablecoin-based global payments and remittance network — the bid to replace SWIFT (today’s global interbank settlement network) with USDC.
Why try to replace SWIFT?
- Cross-border transfers take 2–5 days (business-hours constraints)
- Intermediary banks stack up fees (up to 7–10%)
- Weekend and holiday settlement is unavailable
- Tracking is hard and arrival timing is uncertain
CPN replaces all of that with USDC transfers. When Korea’s Danal piloted USDC remittance to a Japanese enterprise jointly with Shinhan Bank, fees dropped sharply and settlement was instant. CPN extends that model into a network product for global enterprises and financial institutions.
CPN’s growth pace
- Q3 2025: 29 financial institutions onboarded
- Feb 2026: 55 institutions (+90% in three months)
- Annualized volume: ~$5.7B (+68% QoQ)
Still tiny relative to SWIFT’s tens of trillions in annual flow, but the growth rate is striking. Analysts increasingly see CPN cannibalizing certain SWIFT corridors by 2027–2028.
4. Nanopayments — the payment standard for the AI-agent era
This is Circle’s most interesting bet. Nanopayments is a micropayment system in which the per-transaction cost is roughly $0.000001 — a hundredth of a tenth of a cent.
Why is this needed?
Existing payments rails were designed for humans. A person buys a $1 coffee with a credit card — easy. But once AI agents start paying, the story changes.
If a ChatGPT-like AI runs a search on your behalf, a single API call might cost $0.0001. Too small for a human to bother with, but if an AI makes 100 million calls a day, that’s $10,000. You can’t process this through credit-card rails — the fee exceeds the cost.
Circle’s Nanopayments are built for exactly this case: $0.000001 per transaction, sub-second confirmation. More than 100 AI agents are already in testing.
From 2025, agentic AIs like ChatGPT and Claude are starting to act on the internet on behalf of users. Their need for a payment instrument is not far off. If Nanopayments becomes the standard, Circle owns an entirely new category — separate from Visa/Mastercard’s human-payment rails, this is the payment network for AI agents.
5. EURC, USYC, and the $4T RWA market
Beyond USDC, Circle is shipping a broader suite of tokenized products.
EURC — euro-pegged stablecoin
A euro stablecoin compliant with Europe’s MiCA regulation. €389M in circulation as of Feb 2026, up 3.8× YoY. European institutions are actively looking for a USDC alternative — and EURC sits at the front of that line.
USYC — tokenized U.S. T-bill
A tokenized U.S. short-duration Treasury fund, ~$1.7B AUM. Institutional investors use it as a “digital T-bill” they can trade 24/7.
The $4T RWA market is approaching
- 2024 market size: $5B
- 2025 market size: $12.7B (2.5×)
- 2030 outlook: up to $4T (a16z, Stablecoin Insider estimates)
For RWA to scale this way, you need a reliable settlement instrument (a stablecoin) for those assets. Circle has gone in early with USYC and is working to make USDC the standard settlement currency for the RWA market.
If the RWA market lands somewhere between $1T (conservative) and $4T (aggressive) by 2030, and USDC becomes its default settlement currency, USDC float itself could be 5–20× its current level.
6. New-business growth metrics, at a glance
FY2025 YoY growth across the new business stack:
- CCTP volume: $41B in Q4 alone — +270% YoY (cross-chain USDC transport)
- CPN institutions: 29 → 55 — +90%
- EURC circulation: €310M → €389M — +280% YoY
- On-platform USDC: $2.2B → $12.5B — +460% YoY
- Other revenue: $15M → $110M — +633% YoY
Every metric is triple-digit growth. The absolute revenue contribution is still small, but if these growth rates hold, the new businesses can hit 20–30% of Circle’s total revenue by 2027–2028, naturally dragging Treasury-interest dependence down toward 70%.
Circle’s future ultimately hinges on whether the Circle Arc blockchain mainnet succeeds. Land it: a 99× P/E becomes defensible as an IT-platform multiple. Miss it: the market reverts to pricing Circle as a “T-bill ETF.”
DIR Editorial
FAQ (Q&A)
Q1. Can Arc replace Ethereum or Solana?
Not outright. Ethereum is the standard for decentralized DeFi, Solana is the leader for high-performance dApps. The Circle Arc blockchain doesn’t compete head-on — it targets a new category, “institution-friendly payments and capital markets.” Different battlefield, not a share fight.
Q2. Will Nanopayments really be a large market?
Plausibly. McKinsey estimates the AI automation market at $4T by 2030. Whoever owns the payment rails for that market wins one of the defining themes of the next 5–10 years.
Q3. How can Korea leverage Arc and CPN?
Hecto Financial is already on Arc’s testnet and CPN. Korean enterprises remitting to the U.S., Japan, or Southeast Asia are very likely to start using USDC-based rails. The Danal × Shinhan Bank PoC is the early proof point.
Q4. Is the $4T RWA forecast too optimistic?
Yes, $4T is the aggressive case; a conservative case is around $1T. But even $1T is roughly 80× the current $12.7B. Under either scenario, USDC becoming the settlement currency works in Circle’s favor.
- Circle is morphing from a USDC issuer into a digital-dollar infrastructure platform
- The Circle Arc blockchain has 100+ institutional testnet partners (Goldman, Visa, Deutsche Bank, etc.) — 2026 mainnet on the horizon
- CPN (global payments) is at 55 institutions and ~$5.7B annualized volume — 90% quarterly growth
- Nanopayments ($0.000001 per tx) targets the AI-agent payment standard
- EURC and USYC are early plays on the $4T RWA market — potential 80–300× to 2030
- Every new-business metric is triple-digit growth — the escape from T-bill dependence is underway
📊 Next up — should you buy CRCL?
In Part 5 (W5), the series finale, we synthesize everything from Parts 1–4 into an investment verdict on CRCL. Today’s price is $112; market cap $28B; P/E 99×. Cheap? Fair? Expensive? Valuation framework, scenarios, dollar-cost-averaging strategy, risk controls, and a Korea-specific playbook.
👇 Which Circle Arc blockchain or adjacent new-business area excites you most — Arc itself, AI payments, RWA? Drop a comment.
※ This article is informational only and is not investment advice.
※ Sources: Circle SEC EDGAR filings, Circle 4Q25 earnings (Feb 25, 2026), Yahoo Finance, Seeking Alpha, a16z, Stablecoin Insider, Korea Financial News (as of May 2026).
