Outsiders think Bitcoin's big fights are with governments and banks. Mostly, bitcoiners fight each other — and those fights decide what Bitcoin becomes. Here are the seven that matter, both sides argued properly.
☕ 9-minute read
Why this page exists
Bitcoin has no board of directors, so arguments like these are how it's governed: someone proposes, everyone fights, and change only happens when nearly everyone is convinced. That bar is brutally high on purpose. If a debate below seems endless, that's usually the system working.
The original civil war, 2015–2017. Bitcoin's blocks were filling up. Fees were rising. Two visions of the fix collided.
Just make the pages bigger. Bitcoin was meant to be cheap electronic cash for the world; if blocks don't grow with demand, fees price out ordinary people and the mission is dead.
Bigger pages mean a heavier notebook — fewer people can afford to run a node, until only data centers verify the money. Cheap payments belong on layers; the base layer's job is staying verifiable by anyone.
Where it standsThe small blockers won decisively. The big-block faction split off in 2017 to create Bitcoin Cash, which today trades at a small fraction of bitcoin's value. Cheap payments went to Lightning. But the deeper question — what is the base layer for? — never really died. Every debate below is partly its sequel.
Is bitcoin for saving or for spending? Digital gold or digital cash? Satoshi's whitepaper literally says “electronic cash” — and yet.
Monetary goods historically monetize in stages: collectible, then store of value, then medium of exchange, then unit of account. Nobody spends an appreciating asset at stage two — and that's fine. Let it be savings first; spending comes after volatility calms.
Money you never spend is a paperweight. Censorship resistance only matters if people actually transact; a bitcoin that just sits in ETFs is a speculative asset wearing revolutionary clothes. Lightning exists precisely so both can be true now.
Where it standsLess a war than a division of labor these days: the base layer settles like gold, Lightning spends like cash, and both camps claim vindication. The honest answer is that this one gets settled by billions of users' behavior, not by argument.
“Not your keys, not your coins” vs. “my uncle lost his seed phrase.” The oldest practical argument in Bitcoin.
The entire point of Bitcoin is money that answers to no institution. Coins on an exchange are an IOU — and history is a graveyard of exchanges (Mt. Gox, FTX) that proved it. Custodial bitcoin quietly rebuilds the banking system Bitcoin was designed to escape.
Most humans lose passwords. Self-custody puts life savings one misplaced seed phrase from oblivion, with no recourse and no reset button. Regulated custodians, insurance, and ETFs brought in trillions that raw self-custody never would have. Meet people where they are.
Where it standsBoth sides are winning in parallel: ETFs absorbed enormous demand while hardware wallets and collaborative custody (multisig with help) keep maturing. The pragmatic consensus: custodial to start, self-custody as your stack grows — and the risk math is personal.
Which software should nodes run? Bitcoin Core is the standard. Bitcoin Knots is a stricter fork — and its rise is the hottest social fight in Bitcoin today.
Since inscriptions arrived in 2023, the notebook has filled with JPEGs and tokens — spam wearing a transaction costume. Core's developers not only declined to filter it, they loosened data limits. Knots gives node runners the tools to relay money, not memes, and running it is a vote for Bitcoin as money.
Relay filters are theater — if a transaction pays a fee a miner will mine it, filtered or not, so filters just degrade your node's view of reality. Deciding which valid transactions are “legitimate” is a road Bitcoin must never walk; the fee market, not developers, prices block space.
Where it standsGenuinely unresolved. Knots' share of reachable nodes surged from a rounding error to a serious minority since 2025, driven by the spam fight. Both are full nodes enforcing the same consensus rules — for now. Which is exactly why the next debate exists.
The Knots fight, escalated from relay policy to consensus rules: a temporary soft fork that would make data-heavy transactions invalid, with a mandatory-signaling deadline around block 961,632 — early August 2026 — whether the network agrees or not.
Three years of polite filtering changed nothing; the spam only grows and node costs with it. BIP-110 is temporary (one year, self-expiring), targeted, and forces the question everyone's been dodging: is Bitcoin money, or a hard drive? Miners had their chance to act voluntarily.
It's a rule change without consensus — the one thing Bitcoin must never do. A 55% miner threshold (Taproot required 90%) plus mandatory activation invites a chain split; a consensus bug was already found in review; and it would even ban creating output types holding coins today. The cure is categorically worse than the spam.
Where it standsThe tensest moment on Bitcoin's 2026 calendar. Miner signaling sits near zero as the deadline approaches, meaning enforcing nodes could find themselves on a minority chain in September. Even the BIP editor who assigned its number called it careless — and its supporters are running it anyway. Watch this one in real time.
OP_CHECKTEMPLATEVERIFY (BIP-119) would let a coin carry rules about its own future — “these funds can only move to cold storage after a delay” — enabling vaults and better Lightning. Proposed in 2019; a miner-signaling window with a 90% threshold opened March 2026 and runs into 2027.
Seven years of review makes CTV the most-studied upgrade in Bitcoin history, and it's deliberately narrow — templates only, no recursion, no surprises. Vaults alone (theft-resistant self-custody with a recovery window) would do more for ordinary holders' safety than any product ever has. Paired with CSFS, it upgrades Lightning too.
Ossification is a feature: every change to consensus, however careful, spends some of the credibility that makes the 21M cap believable. “Narrow” covenants still open a door — and the demand is loudest from businesses building products, which isn't the same as the network needing it. No rush means no rush.
Where it standsThe signaling window is open right now with the outcome genuinely uncertain — it needs 90% of miners, a bar only broadly-loved upgrades clear. Whatever happens, CTV has become the referendum on a deeper question: is Bitcoin finished?
An opcode Satoshi himself disabled in 2010, proposed for revival as BIP-347. It just concatenates two pieces of data — trivially simple, and in combination with everything else, it unlocks vastly more expressive programming on Bitcoin.
One tiny, well-understood operation reopens a universe: bridges, advanced vaults, even verifying modern cryptographic proofs on Bitcoin — letting Bitcoin absorb functionality that currently drives users to riskier chains. It's already running on test networks and sidechains, where it's the most-used new opcode by far.
Its power is the problem: OP_CAT enables recursive covenants — coins that constrain their own future forever — and nobody can fully enumerate what else. It could import the toxic MEV dynamics that plague other chains. Satoshi turned it off for a reason; “we can't predict the consequences” is the argument against, stated by its own supporters.
Where it standsFurther from activation than CTV — the community treats it as the bold option next to CTV's cautious one, and the two camps often argue with each other as much as with skeptics. The likeliest path anyone sketches: careful covenants first, and OP_CAT waits for evidence.
The pattern
Squint and all seven collapse into one question: should Bitcoin change to do more, or stay still to stay trustworthy? The blocksize war asked it about payments. Knots and BIP-110 ask it about data. CTV and OP_CAT ask it about programmability. Bitcoin's consistent answer so far — change slowly, prove everything, let the cautious side win ties — is exactly why the 21 million cap is believable at all.