Historical archive · 2023 · 22 briefings
22 original, source-linked historical crypto briefings associated with events or proposals documented in 2023. Articles were published Sep 28, 2026.
Security · Historical retrospective · 2023
In December 2023 a malicious Ledger Connect Kit package affected some decentralized application interfaces and redirected users toward fraudulent transaction flows.
Read the briefing →Security · Historical retrospective · 2023
In July 2023 a bug affecting specific Vyper compiler versions was linked to reentrancy vulnerabilities in several Curve pools and other contracts.
Read the briefing →Layer 2 · Historical retrospective · 2023
Base launched its public mainnet in 2023 as an Ethereum layer-two network built using Optimism’s OP Stack.
Read the briefing →Layer 2 · Historical retrospective · 2023
Optimism’s Bedrock upgrade changed its rollup architecture to improve modularity, reduce costs and better align with Ethereum execution concepts.
Read the briefing →NFTs · Historical retrospective · 2023
The BRC-20 experiment used Ordinals inscriptions to encode simple token deployment, mint and transfer instructions outside Bitcoin’s native token model.
Read the briefing →Layer 2 · Historical retrospective · 2023
Celestia’s design separates data availability from execution, allowing rollups and other systems to use a dedicated network for publishing transaction data.
Read the briefing →NFTs · Historical retrospective · 2023
EIP-6909 defines an alternative multi-token interface intended to simplify token accounting and support efficient transfers across many token IDs.
Read the briefing →DeFi · Historical retrospective · 2023
Shapella enabled validators to withdraw staked ETH and rewards after the initial Beacon Chain launch had accepted deposits without withdrawal functionality.
Read the briefing →Policy · Historical retrospective · 2023
In February 2023 the SEC announced that Kraken agreed to discontinue its U.S. staking-as-a-service program and pay a civil penalty to settle the Commission’s charges.
Read the briefing →NFTs · Historical retrospective · 2023
The Ordinals system assigns satoshi-level ordering and allows arbitrary witness data to be associated with individual satoshis as inscriptions.
Read the briefing →Stablecoins · Historical retrospective · 2023
PayPal announced PYUSD in 2023 as a dollar-denominated stablecoin issued through Paxos and made available within its payment ecosystem.
Read the briefing →Layer 2 · Historical retrospective · 2023
Polygon launched its zkEVM mainnet beta in 2023, using validity proofs and an EVM-oriented development environment.
Read the briefing →Ethereum · Historical retrospective · 2023
The April 2023 Shanghai-Capella upgrade added withdrawal functionality for validators and stakers after the Beacon Chain transition.
Read the briefing →Stablecoins · Historical retrospective · 2023
Payment firms and fintechs explored stablecoins for transfers and settlement, leveraging blockchain rails while retaining issuer-managed units of account.
Read the briefing →Policy · Historical retrospective · 2023
In August 2023 the D.C. Circuit vacated the SEC’s order denying Grayscale’s proposed conversion, finding the agency had not adequately explained its different treatment of similar products.
Read the briefing →Policy · Historical retrospective · 2023
Regulation (EU) 2023/1114 created common rules for crypto-asset issuers and service providers across the European Union, with staged application dates.
Read the briefing →Security · Historical retrospective · 2023
In March 2023 Euler Finance reported an exploit; the attacker later returned most of the funds after negotiations and a public response.
Read the briefing →Layer 2 · Historical retrospective · 2023
Optimism’s OP Stack is a collection of software components for building Ethereum-compatible rollups, with the Superchain vision linking multiple chains.
Read the briefing →Policy · Historical retrospective · 2023
In June 2023 the SEC filed charges against Binance entities and founder Changpeng Zhao, alleging securities-law violations; the release describes the agency’s claims.
Read the briefing →Policy · Historical retrospective · 2023
On June 6, 2023, the SEC announced charges alleging Coinbase operated as an unregistered exchange, broker and clearing agency and offered an unregistered staking service.
Read the briefing →DeFi · Historical retrospective · 2023
UniswapX introduced an intent-oriented swap flow in which external fillers compete to execute user orders under specified terms.
Read the briefing →Layer 2 · Historical retrospective · 2023
zkSync Era opened a public network for smart contracts using validity proofs and a system designed for Ethereum-like development.
Read the briefing →Event or proposal year: 2023. These retrospective articles were first published Sep 28, 2026.