[Weekly Crypto] 2026.09.21

1️⃣ Circle Launches Arc Mainnet, a Payments Layer-1 Where USDC Is the Gas Token Circle brought its Arc blockchain to mainnet on September 16, an EVM-compatible layer-1 built for stablecoin payments and capital markets where USDC itself pays for gas instead of a separate volatile token. Arc launched with sub-second settlement finality, support for more than 20 fiat-backed stablecoins and interoperability with over 20 chains, carrying tokenized assets including BlackRock's BUIDL, and minted 10 billion ARC tokens at genesis. More than 100 companies joined the testnet that opened in October 2025, and over 100 institutional participants — among them BlackRock, Goldman Sachs, Mastercard and Visa — took part in the private mainnet phase. CEO Jeremy Allaire called it "the single most significant launch in Circle's history since USDC itself," marking Circle's move from issuing a stablecoin to owning the settlement layer it runs on. Cointelegraph

2️⃣ ECB Deploys Pontes, Letting Banks Settle Tokenized Assets in Central-Bank Money The European Central Bank rolled out Pontes on September 21, a wholesale platform that connects distributed-ledger market infrastructure to the Eurosystem's TARGET Services so banks and financial institutions can settle tokenized-asset transactions directly in central-bank money. The ECB also said it will invest its own funds in tokenized securities through the platform, putting the central bank on the buy side of the market it is building rails for. "Pontes is a digital euro made available for banks so that they can transact amongst themselves using tokenized assets and distributed ledger technology," said ECB President Christine Lagarde. Pontes is separate from the retail digital euro pilot — 36 banks and payment firms were selected for that track in July 2026, with the pilot set for the second half of 2027 and potential issuance in 2029 — and gives European institutions a settlement asset that is not a stablecoin. CoinDesk

3️⃣ Hana Bank Issues South Korea's First Digital Bond on Euroclear's Blockchain Hana Bank, South Korea's second-largest bank, issued a $100 million foreign-currency digital bond on Euroclear's Digital Financial Market Infrastructure (D-FMI) platform, with Standard Chartered as sole lead manager. The deal settled T+0 — same day, against the three to five business days a conventional foreign-currency bond takes — and is the first time a Korean financial institution has used Euroclear's distributed ledger infrastructure directly. "The $100 million digital bond issuance and implementation of T+0 settlement represent a significant step beyond simply diversifying our funding channels, as they bring blockchain technology into the capital market," a Hana Bank official said. The issuance lands ahead of South Korea's tokenized securities framework, scheduled to take effect in February 2027. CoinDesk

4️⃣ Coinbase Opens IPO Allocations to US Retail Customers, Starting with Oura Coinbase began offering IPO share allocations to eligible US retail customers on September 21, letting them request shares at the offer price inside the Coinbase app before a stock starts trading publicly. Smart ring maker Oura is the first listing on the platform, debuting this week, with customers receiving full, partial or no allocation depending on demand. Coinbase Capital Markets handles the offering while Apex provides execution, clearing and custody. The company framed it as "yet another step toward growing the Everything Exchange, as our US customers now gain early exposure to high-interest companies before they hit public exchanges" — extending a push into traditional markets that began with pre-IPO perpetual futures for non-US users in June 2026. The Block

5️⃣ XRP Ledger's Batch V1.1 Enters Activation Countdown, Bundling Eight Transactions into One The XRP Ledger's Batch V1.1 amendment began its 14-day activation countdown on September 15 and is expected to go live shortly after September 29, provided validator support stays at or above 80%. The feature groups up to eight transactions into a single all-or-nothing operation, which makes delivery-versus-payment settlement possible on-chain — the asset transfer and the payment either both complete or neither does — and lets platforms bundle service fees with customer payments in one step. V1.1 is a redesign after a signature-validation flaw was found in the original version that could have permitted unauthorized transactions; the rewrite went through internal adversarial testing, AI-assisted analysis, a Sherlock attack contest and reviews by security firms Halborn and Common Prefix. "Batch allows multiple transactions to be grouped together so they either all execute or none do — particularly important for delivery-versus-payment scenarios," said RippleX Head of Engineering Ayo Akinyele, who added that asset managers are already building with it in mind. CoinDesk