Bitcoin Breaks $1,900 as Barry Silbert Secures 78% Hashrate Support for Scaling Compromise

Executive Summary

Bitcoin is trading at $1,888 on May 18, 2017, after hitting an intraday high of $1,904—a level that would have seemed unthinkable just six months ago when the cryptocurrency languished below $1,000. The rally is being supercharged by a dramatic development in the scaling debate: Digital Currency Group founder Barry Silbert has secured commitments from miners representing 78.3% of Bitcoin’s total hashrate to support a compromise that includes immediate Segregated Witness activation and a 2MB block size increase within twelve months. Over 50 Bitcoin companies from approximately 20 countries have signed on to the agreement.

The convergence of technical progress on scaling and Bitcoin’s relentless price appreciation creates a moment of both optimism and uncertainty. The global cryptocurrency market cap has swelled to approximately $38 billion for Bitcoin alone, with the total crypto market approaching $75 billion.

The Numbers Unpacked

Bitcoin’s price trajectory in May 2017 tells the story of an asset entering a new phase of mainstream awareness. After opening the year at roughly $960, Bitcoin has nearly doubled in five months:

• January 1: ~$960
• April 1: ~$1,075
• May 1: ~$1,440
• May 10: ~$1,720
• May 17: $1,839
• May 18 intraday high: $1,904

The pace of appreciation has accelerated dramatically in the second week of May, with Bitcoin gaining over $300 in just eight days. Trading volume on major exchanges has surged, with the 24-hour volume on May 18 alone exceeding $894 million across all tracked exchanges.

Altcoins are also experiencing significant movement. Ethereum trades at approximately $91 with a market cap of $8.3 billion, making it the third-largest cryptocurrency behind Bitcoin and XRP. Ripple’s XRP has surged 48% over the past week to $0.22, while Litecoin holds steady at $28.89 following its own successful SegWit activation.

Historical Context

The scaling debate that has consumed the Bitcoin community for over two years reached an inflection point this week. Since the Hong Kong Agreement of February 2016—in which miners committed to activating SegWit in exchange for a future hard fork to increase the block size—progress has been stalled. Miners never fully honored their commitment to activate SegWit, and the Bitcoin community grew increasingly frustrated with rising transaction fees and network congestion.

The situation has become acute in May 2017. The Bitcoin mempool is overflowing, with an estimated $1 billion worth of transactions stuck in a confirmation backlog. Average transaction fees have exceeded 420 satoshis per byte, making small transactions economically impractical. Wallet provider Xapo has resorted to absorbing elevated miner fees on behalf of users, an unsustainable practice that highlights the urgency of scaling solutions.

Silbert’s proposal is essentially a reinvigoration of the Hong Kong framework: immediate SegWit activation followed by a commitment to implement a 2MB block size hard fork within twelve months. The critical difference is the public commitment of 78.3% of hashrate—a threshold that, if maintained, would be sufficient to activate SegWit through miner signaling (BIP 141 requires 95% signaling for lock-in, though alternative activation mechanisms exist).

Expert Consensus

The reaction to Silbert’s compromise proposal has been mixed across different factions of the Bitcoin community. Erik Voorhees, founder of Shapeshift, offered unequivocal support: “I cannot endorse this strongly enough.” The co-founders of Satoshi Labs and mining magnate Chandler Guo have also publicly aligned with the proposal.

However, prominent Bitcoin Core contributor Peter Todd expressed skepticism, suggesting that Silbert should instead focus on supporting a User-Activated Soft Fork (UASF)—a mechanism by which nodes rather than miners enforce protocol changes. Todd’s position reflects a broader concern among small-block advocates that miners have repeatedly failed to honor scaling commitments.

Big-block supporters have their own reservations. Some argue that immediate SegWit activation without ironclad guarantees of a subsequent 2MB hard fork simply repeats the broken promises of the Hong Kong Agreement. The confusion is compounded by uncertainty over whether Silbert’s plan mirrors the Hong Kong framework or incorporates Sergio Demian Lerner’s Segwit2MB proposal, which would implement both changes simultaneously.

Meanwhile, Adam Back, the cryptographer often cited as a potential Satoshi Nakamoto candidate, offered a measured response: “I believe they mean two scale steps, deploy current SegWit, then work towards a further scale improvement. Many options for how.”

Forward Outlook

The immediate question is whether Silbert’s compromise can translate stated miner support into actual code deployment. The history of Bitcoin scaling negotiations is littered with failed agreements, and the gap between a Twitter announcement and a protocol change remains vast. SegWit activation requires sustained signaling by miners over a 2,016-block period, and nothing in Silbert’s announcement suggests this process has formally begun.

The broader market context adds urgency. Bitcoin’s price surge has drawn unprecedented mainstream media attention, amplified by the WannaCry ransomware attack that began on May 12. The global cyberattack, which infected over 200,000 computers in 150 countries and disrupted operations at the UK’s National Health Service, demanded Bitcoin ransoms of $300-$600. While the attack generated only approximately $26,000 in Bitcoin payments, it introduced millions of people to the concept of cryptocurrency for the first time—and not always in a positive light.

For Bitcoin investors and users, the path forward hinges on three variables: whether the scaling compromise actually activates SegWit, whether the promised 2MB hard fork materializes, and whether Bitcoin’s price momentum can be sustained through what could be months of technical and political negotiations. The cryptocurrency market’s total capitalization approaching $75 billion suggests that investors are betting on a resolution—but the gap between optimism and execution has burned Bitcoin stakeholders before.

Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency markets are highly volatile, and past performance does not guarantee future results. Always conduct your own research before making investment decisions.