On December 19, 2025, credit reporting firm 700Credit disclosed a data breach that may have exposed personal information belonging to 5,836,521 individuals in the United States. The company reported that names, Social Security numbers, financial account details and other sensitive data could be compromised following unauthorized access to its systems. Affected consumers are being urged to monitor their credit activity and consider fraud alerts or credit freezes while regulators continue to investigate the incident.

According to new modeling by RWA.io, fragmentation across blockchain networks is imposing an economic drag of up to $1.3 billion per year on tokenized real-world assets as crosschain price gaps and capital friction persist. The report cites typical 1%–3% price spreads for equivalent tokens on different chains and average losses of about 3.5% per capital reallocation, warning that at a projected $16 trillion–$30 trillion RWA market by 2030, annual efficiency losses could reach $30 billion–$75 billion.

On December 18, 2025, Aptos outlined AIP-137 introducing SLH-DSA-SHA2-128s as its first post-quantum signature option, according to an Aptos post. The scheme yields 7,856-byte signatures and about 294-microsecond verification, trading efficiency for security while keeping Ed25519 as the default. Governance can enable the new scheme when quantum risks warrant activation.

Coinbase filed lawsuits against Michigan, Illinois, and Connecticut, alleging the states are improperly policing prediction markets that it says fall under CFTC authority. A Thursday filing in the Northern District of Illinois seeks declaratory and injunctive relief, and the exchange plans U.S. event‑contract trading from January 2026.

According to a Wall Street Journal report, Terraform Labs' court-appointed plan administrator Todd Snyder has sued Jump Trading, co-founder William DiSomma, and former president Kanav Kariya, seeking $4 billion in damages. Snyder alleges Jump profited through a clandestine arrangement tied to TerraUSD, while a Jump spokesperson called the case a "desperate attempt" and vowed a vigorous defense.

At its final press conference of the year on Thursday, the ECB said it has finished the technical and preparatory work for a retail digital euro and is awaiting authorization from the European Council and Parliament. The Commission's proposal envisions legal tender status and privacy protections, with a pilot possible in 2027 if legislation passes by 2026.

On December 18, 2025 in Zug, the dYdX Foundation held its Monthly Analyst Call with dYdX Labs, outlining recent performance and governance moves. Over the latest 30 days, the protocol saw $16.1 billion in perpetual volume and daily activity of $600–800 million, while approving Surge Season 9 with a 50% fee rebate and a $1 million incentive program. The month also added Solana spot trading with U.S. access and a BONK partnership that shares 50% of fees with the BONK DAO.

At the ECB's final press conference on Thursday, Christine Lagarde said the digital euro is technically ready and now awaits decisions by the European Council and European Parliament. In September, Executive Board member Piero Cipollone called a rollout around mid-2029 "a fair assessment." Lagarde also said MiCA-compliant stablecoins can be supervised and regarded as safe.