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Bitcoin Core 30 to Increase OP_RETURN Data Limit After Developer Debate Concludes

The developers of Bitcoin Core, the primary open-source software for connecting the blockchain behind the world’s largest cryptocurrency, said October’s version 30 release will increase the default limit for OP_RETURN data transactions from the current 80 bytes to nearly 4MB, a limit imposed by Bitcoin’s block size.
The proposal for the change, which was confirmed in an update on GitHub, had sparked debate within the Bitcoin community. Critics argued that removing the limit could encourage increased embedding of arbitrary data, potentially leading to network spam and a shift from bitcoin’s BTC primary function as a financial tool.
This decision to go ahead marks another significant moment in the community’s debate about blockchain usage, highlighting persistent tensions between network efficiency, practical use cases and ideological principles.
The OP_RETURN code allows Bitcoin users to include data in transactions. The functionality is conceptually similar to, though technically distinct from, the way Inscriptions embed images and text directly into the blockchain using Ordinals and witness data.
Some argue that adding this transaction data is «arbitrary» and contradicts the original vision for the Bitcoin blockchain as proposed by Satoshi Nakamoto.
The 80-byte limit on OP_RETURN encouraged alternative methods of data storage, some of which caused issues like bloating the unspent transaction output (UTXO) set.
In a detailed GitHub summary and subsequent X post, Bitcoin Core developer Gloria Zhao outlined the reasoning behind the change.
Zhao emphasized the intention to mitigate unintended consequences of the existing limit, noting, “The primary motivation for this [change] is to correct a mismatch between the harmfulness and standardness of data storage techniques.”
Developer Greg Sanders, who authored the merged pull request, said in GitHub discussions that the removal of the limit “yields at least two tangible benefits: a cleaner UTXO set and more consistent default behavior.”
Debate over governance
Zhao also addressed broader governance issues on her X page, highlighting Bitcoin Core’s commitment to transparency and meritocracy.
She stressed the importance of the community’s role in maintaining these principles, warning against the risks of social engineering or corporate pressure influencing the software developers’ decision-making process.
“If Bitcoin Core’s contributors ever abandon these values, e.g., to appease social media or corporate wishes, the community will switch to another node implementation that does it better,” Zhao wrote, urging users to remain vigilant and informed.
Developer Luke Dashjr has consistently opposed easing the limits, labeling the move as potentially harmful. He encouraged users to avoid upgrading to the new version or to adopt alternative node implementations, such as Bitcoin Knots.
The debate mirrors the controversies of 2023, notably around Ordinals and Inscriptions, when users embedded substantial non-financial data, such as images and text, into Bitcoin transactions, prompting similar concerns about blockchain misuse and network congestion.
Despite these concerns, Zhao maintained that attempts to censor transaction types through relay policy are impractical and ineffective against strong economic incentives. Bitcoin Core’s approach should remain neutral, reflecting the network’s foundational principles of censorship resistance and decentralization, she said.
The Core 30 release will retain manual control options, allowing users to enforce stricter limits through existing command-line parameters. However, these options are now marked as deprecated and will trigger warning messages, indicating potential removal in future updates without a set timeline.
Business
Crypto Trading Firm Keyrock Buys Luxembourg’s Turing Capital in Asset Management Push

Crypto trading firm Keyrock said it’s expanding into asset and wealth management by acquiring Turing Capital, a Luxembourg-registered alternative investment fund manager.
The deal, announced on Tuesday, marks the launch of Keyrock’s Asset and Wealth Management division, a new business unit dedicated to institutional clients and private investors.
Keyrock, founded in Brussels, Belgium and best known for its work in market making, options and OTC trading, said it will fold Turing Capital’s investment strategies and Luxembourg fund management structure into its wider platform. The division will be led by Turing Capital co-founder Jorge Schnura, who joins Keyrock’s executive committee as president of the unit.
The company said the expansion will allow it to provide services across the full lifecycle of digital assets, from liquidity provision to long-term investment strategies. «In the near future, all assets will live onchain,» Schnura said, noting that the merger positions the group to capture opportunities as traditional financial products migrate to blockchain rails.
Keyrock has also applied for regulatory approval under the EU’s crypto framework MiCA through a filing with Liechtenstein’s financial regulator. If approved, the firm plans to offer portfolio management and advisory services, aiming to compete directly with traditional asset managers as well as crypto-native players.
«Today’s launch sets the stage for our longer-term ambition: bringing asset management on-chain in a way that truly meets institutional standards,» Keyrock CSO Juan David Mendieta said in a statement.
Read more: Stablecoin Payments Projected to Top $1T Annually by 2030, Market Maker Keyrock Says
Business
Crypto Trading Firm Keyrock Buys Luxembourg’s Turing Capital in Asset Management Push

Crypto trading firm Keyrock said it’s expanding into asset and wealth management by acquiring Turing Capital, a Luxembourg-registered alternative investment fund manager.
The deal, announced on Tuesday, marks the launch of Keyrock’s Asset and Wealth Management division, a new business unit dedicated to institutional clients and private investors.
Keyrock, founded in Brussels, Belgium and best known for its work in market making, options and OTC trading, said it will fold Turing Capital’s investment strategies and Luxembourg fund management structure into its wider platform. The division will be led by Turing Capital co-founder Jorge Schnura, who joins Keyrock’s executive committee as president of the unit.
The company said the expansion will allow it to provide services across the full lifecycle of digital assets, from liquidity provision to long-term investment strategies. «In the near future, all assets will live onchain,» Schnura said, noting that the merger positions the group to capture opportunities as traditional financial products migrate to blockchain rails.
Keyrock has also applied for regulatory approval under the EU’s crypto framework MiCA through a filing with Liechtenstein’s financial regulator. If approved, the firm plans to offer portfolio management and advisory services, aiming to compete directly with traditional asset managers as well as crypto-native players.
«Today’s launch sets the stage for our longer-term ambition: bringing asset management on-chain in a way that truly meets institutional standards,» Keyrock CSO Juan David Mendieta said in a statement.
Read more: Stablecoin Payments Projected to Top $1T Annually by 2030, Market Maker Keyrock Says
Business
Gemini Shares Slide 6%, Extending Post-IPO Slump to 24%

Gemini Space Station (GEMI), the crypto exchange founded by Cameron and Tyler Winklevoss, has seen its shares tumble by more than 20% since listing on the Nasdaq last Friday.
The stock is down around 6% on Tuesday, trading at $30.42, and has dropped nearly 24% over the past week. The sharp decline follows an initial surge after the company raised $425 million in its IPO, pricing shares at $28 and valuing the firm at $3.3 billion before trading began.
On its first day, GEMI spiked to $45.89 before closing at $32 — a 14% premium to its offer price. But since hitting that high, shares have plunged more than 34%, erasing most of the early enthusiasm from public market investors.
The broader crypto equity market has remained more stable. Coinbase (COIN), the largest U.S. crypto exchange, is flat over the past week. Robinhood (HOOD), which derives part of its revenue from crypto, is down 3%. Token issuer Circle (CRCL), on the other hand, is up 13% over the same period.
Part of the pressure on Gemini’s stock may stem from its financials. The company posted a $283 million net loss in the first half of 2025, following a $159 million loss in all of 2024. Despite raising fresh capital, the numbers suggest the business is still far from turning a profit.
Compass Point analyst Ed Engel noted that GEMI is currently trading at 26 times its annualized first-half revenue. That multiple — often used to gauge whether a stock is expensive — means investors are paying 26 dollars for every dollar the company is expected to generate in sales this year. For a loss-making company in a volatile sector, that’s a steep price, and could be fueling investor skepticism.
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