The Bitcoin block size debate reached a critical juncture on December 3, 2015, as Jim Burton, the British lead developer of the lightweight Bitcoin client MultiBit, publicly voiced his support for a rapid increase in the block size limit. With Bitcoin trading at approximately $361 and the network struggling to handle growing transaction volumes, the call for scaling solutions highlighted a divide that would shape the future of blockchain technology for years to come.
TL;DR
- MultiBit lead developer Jim Burton publicly supported BIP 101 for rapid block size increases
- Bitcoin network experienced transaction backlogs during Black Friday 2015
- Scaling Bitcoin Hong Kong workshop scheduled for December 6-7, 2015
- BIP 101 proposed increasing block size to 8MB, doubling every two years
- Counterparty (XCP) ranked #18 on CoinMarketCap at $0.82, showcasing early tokenization
The Case for Bigger Blocks
In an interview with Bitcoin Magazine, Burton made a philosophical argument rooted in the original vision of Bitcoin’s pseudonymous creator. “Philosophically, we think that Satoshi’s vision of a peer-to-peer currency needs bigger blocks,” Burton stated. “We want people to be able to transact person-to-person ‘on-chain’. We are starting to see large transaction backlogs, for instance recently on Black Friday, so the need for bigger blocks is clear.”
The Black Friday transaction delays were particularly concerning for the young Bitcoin ecosystem. As more merchants began accepting cryptocurrency payments, the network’s 1MB block size limit was becoming a genuine bottleneck. Transactions were taking longer to confirm, and fees were beginning to rise as users competed for limited block space.
BIP 101 vs. The Alternatives
At the center of the debate was BIP 101, a proposal authored by Bitcoin Core and Bitcoin XT developer Gavin Andresen. The plan would increase the maximum block size from 1MB to 8MB, with the limit doubling every two years for two decades, eventually reaching an 8GB block size. Implementation would require 75% of mining power to signal support before activation.
However, BIP 101 was not the only proposal on the table. Blockstream CEO and Hashcash inventor Dr. Adam Back had put forward a “2-4-8” alternative — a more gradual approach that would incrementally increase the limit to 8MB in three steps over four years. Burton expressed openness to either approach, noting that MultiBit’s architecture was designed to be agnostic to block size changes.
“We would be very pleased to see BIP 101 implemented, but if the consensus is that increasing it ‘2-4-8’ is a safer procedure we would be happy to see that, too,” Burton said.
The Counterparty Connection: Early Digital Assets on Bitcoin
While the block size debate raged on, the Bitcoin blockchain was already being used as a platform for digital assets beyond simple transactions. Counterparty (XCP), a protocol built on top of Bitcoin that enabled the creation of custom tokens and digital assets, sat at position #18 on CoinMarketCap with a price of approximately $0.82 and a market capitalization of $2.17 million.
Counterparty represented one of the earliest attempts at tokenizing digital assets on the Bitcoin blockchain. The platform allowed users to create and trade custom tokens, effectively serving as a precursor to the token standards that would later emerge on other blockchains. For proponents of bigger blocks, platforms like Counterparty illustrated exactly why scaling was necessary — as more innovative uses of the blockchain emerged, demand for block space would only increase.
The Hong Kong Workshop Looms
All eyes in the Bitcoin community were turning toward the Scaling Bitcoin workshop scheduled for December 6-7 in Hong Kong. The event was expected to bring together a large segment of Bitcoin’s academic and engineering community to discuss the path forward on scaling. Burton, while not attending in person, indicated he would follow the proceedings closely.
“Most people I have spoken to about the block-size limit want to see action rather than a prolonged debate, so I am hoping we will see a clear path forward in the next couple of months,” Burton added.
The stakes were significant. Ethereum, still in its infancy, was trading at just $0.81 with a market cap of only $61 million — a fraction of Bitcoin’s $5.38 billion. But Ethereum’s design, which allowed for more flexible smart contract execution, was already being discussed as an alternative for developers who found Bitcoin’s block size constraints too limiting for building decentralized applications.
Why This Matters
The block size debate of December 2015 was far more than a technical argument about megabytes. It was a fundamental question about what Bitcoin should be — a settlement layer for high-value transactions, or a peer-to-peer electronic cash system capable of handling global transaction volume. The decision would ripple through the entire cryptocurrency ecosystem, influencing the development of digital collectibles, tokenized assets, and the broader blockchain innovation landscape.
MultiBit, launched more than four years earlier, was one of the most popular lightweight Bitcoin wallets of its era. Burton’s advocacy for bigger blocks reflected the pragmatic concerns of developers building user-facing applications who needed the network to handle growing demand. As Bitcoin’s price hovered around $361 and its total market capitalization stood at $5.38 billion, the community was grappling with the challenges of success — more users, more transactions, and more innovative use cases all competing for the same limited block space.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Historical crypto prices and market data referenced are from December 3, 2015.