Bitcoin's BIP-110 fork stalls as Polymarket opens 57% odds on a sub-$55,000 year-end print

On 8 August 2026, at block height 961,632, the BIP-110 enforcing fork entered mandatory signaling on the Bitcoin network. By 9 August, it had mined just two blocks. Cointelegraph reported the enforcing branch remained stuck at the full mining difficulty, with mandatory signaling proceeding under hashpower support that Cointelegraph and CoinDesk both placed below 3%.

The story is not the fork itself. It is the price tape underneath it, and the prediction market that opened a 57% line on Bitcoin closing the year below $55,000.

Two blocks, full difficulty, almost no miners

The technical detail that does the damage to the fork is structural. BIP-110's enforcing nodes need to mine at the existing difficulty to be compatible with the rest of the network. If a miner on the enforcing side finds a block at lower difficulty, the rest of the network rejects it. That constraint collapses the economics for any miner willing to enforce: the cost is the same as mining on Bitcoin proper, but the rewards, in the absence of an exchange willing to credit fork coins, are uncertain.

Cointelegraph's coverage on 8 August noted that "the enforcing fork remains stuck at Bitcoin's full mining difficulty" with "little hashpower support." By 9 August, two blocks had been produced on the enforcing branch. A CoinDesk developer warning published earlier in the day had already advised holders that selling coins issued on a minority fork could let buyers replay the signed transaction on Bitcoin itself. The safer course, the developer argued, was to do nothing until the two chains separated cleanly.

The fork is, in other words, functioning as designed. It is just functioning slowly. Free-market capitalism in its purest form, as CoinDesk's day-ahead note put it: the miners who said they would enforce have not shown up at scale, and the protocol has priced their absence.

The price is doing the talking

Bitcoin was trading around $63,500 to $65,500 through the weekend, caught between technical pivots that Investing.com's live-levels coverage tracked hourly. A separate Investing.com dispatch on 9 August put the print below $65,000, attributing the slip to fork-related caution that was partly offset by ETF inflows. The 200-period moving average sat close enough to current prices that a clean break either way would reset the chart.

A Polymarket contract, indexed at 57% on 10 August 2026 at 22:17 UTC, puts the implied probability of Bitcoin trading below $55,000 at the year-end expiry at well over even money. That is a substantial move from spot: roughly a 13% drawdown from the upper end of the weekend range, or a 19% move from the lower end. The market is not pricing a crash. It is pricing a drift.

What the miners are really saying

The conventional read is that BIP-110 is a governance dispute dressed up as a technical one, and that the lack of hashpower is a verdict. The alternative read is that miner behavior on a soft fork is a noisy signal: pools that disapprove of a change have no incentive to mine empty blocks on a chain their customers do not want, and many of them have publicly opposed BIP-110 without saying so on-chain. CoinDesk's coverage of block 961,632 noted that "influential commentators have also voiced their opposition."

Monexus assessment: the dominant framing holds. A fork that has produced two blocks at mandatory signaling, with miner support below 3% and a developer community warning holders not to touch fork coins, is not on its way to becoming Bitcoin. It is on its way to becoming a curiosity. The remaining analytical question is what the episode tells us about the next governance fight, and whether the same minority will try again with a different proposal and a different set of intermediaries.

The market is pricing drift, not a crisis

A 57% line on a sub-$55,000 year-end print does not mean traders expect a sudden failure. It means they expect the post-fork price action to grind. The fork itself removes a small amount of headline risk if it expires quietly; it adds a larger amount of governance risk if the same coalition regroups.

The structural frame, in plain terms: Bitcoin's market cap sits on top of a protocol that resolves disagreements by counting hashpower, and the hashpower has spoken. What the Polymarket line captures is the second-order question: how much of the weekend's squeeze is technical, how much is fork-related, and how much is just the absence of a bid. The honest answer from the sources is that the inputs are mixed and the chart will tell us which one mattered.

What the cited sources do not specify is the identity of the influential commentators CoinDesk referenced in its block 961,632 coverage, or the specific exchange posture toward fork-coin listings. Those details will determine whether the episode is remembered as a near-miss or as the start of a longer argument.

Wire provenance

This editorial synthesis draws on the following public wire/social posts:

• https://poly.market/J6JR8qL
• https://x.com/Polymarket/status/2086939899668889900
• https://www.coindesk.com/daybook-us/2026/08/10/bitcoin-s-bip-110-episode-is-free-market-capitalism-in-purest-form
• https://cointelegraph.com/news/bitcoin-bip-110-branch-stalls-miner-support
• https://www.investing.com/news/cryptocurrency-news/bitcoin-slips-below-65000-as-etf-inflows-offset-fork-concerns-4847718
• https://cointelegraph.com/news/bitcoin-bip-110-mandatory-signaling
• https://www.coindesk.com/tech/2026/08/07/frame-bitcoin-s-bip-110-enters-mandatory-signaling-with-less-than-3-miner-support
• https://www.investing.com/news/cryptocurrency-news/bitcoin-trapped-in-635k655k-squeeze-hourly-levels-93CH-4847929
• https://www.coindesk.com/tech/2026/08/08/bitcoin-holders-risk-losing-real-btc-if-they-sell-coins-from-bip-110-fork-says-developer