Who Is Leonidas and How the Runestone Founder Is Reshaping Bitcoin

Leonidas is a pseudonymous developer and co-founder of Runestone, and over the past two years he has become the most effective advocate for a use of Bitcoin that a large part of Bitcoin's own community actively resents. He seeded the DOG token, helped push the Runes standard into mainstream use, and sits at the center of the Ordinals ecosystem. On July 17 and 18, 2026, he proposed something called DOG Mode, and the reaction told you exactly how contested his corner of Bitcoin has become.

He writes under the Leonidas handle and does not publish a legal identity, which is unremarkable in Bitcoin development. What is public is the record of what he has built and argued, and that record is long enough to profile without guessing at anything else.

Where things stand, July 20, 2026

- BTC trades around $64,785 and is broadly flat

- ETH trades around $1,878

- DOG Mode proposed July 17-18, 2026, would free an estimated $25 million locked as transaction padding

- BIP-110, the rival anti-spam proposal, needs 55% miner signaling and has drawn roughly zero this period

- Michael Saylor published a 110-point essay on July 19, 2026 urging Bitcoin to reject BIP-110

Most readers have never touched an inscription or a Rune, so this profile has to explain the ecosystem before it can explain the man. Here is what Ordinals and Runes actually are, what Leonidas built on top of them, and why one procedural detail may decide the whole fight.

What Ordinals Are in Plain Language

Bitcoin has 2.1 quadrillion satoshis, the smallest unit of the currency. Ordinal theory assigns every one of them a serial number based on the order it was mined, which makes individual satoshis distinguishable from each other rather than interchangeable. Once a satoshi has a number, you can attach data to it.

That attachment is called an inscription. You can write an image, a text file, an audio clip or arbitrary data directly into a Bitcoin transaction, and the Ordinals protocol documentation describes how the data binds to a specific satoshi and travels with it when that satoshi moves. The practical result is a Bitcoin-native collectible with no separate chain, no smart contract platform and no bridge involved. The image lives in Bitcoin's own blocks, and owning the satoshi means owning the image.

That is genuinely different from how NFTs work on Ethereum, where a token typically points at a file hosted somewhere else. It is also the source of the entire dispute, because those images occupy blockspace that would otherwise carry payments.

What Runes Are and Why They Replaced the Older Approach

Ordinals handle one-of-one items. Runes handle fungible tokens, meaning the kind where every unit is identical and interchangeable, the way one dollar equals any other dollar.

Earlier attempts to issue tokens on Bitcoin worked by inscribing token instructions one at a time and asking off-chain indexers to keep score, which was heavy. Every mint and every transfer created its own inscription, and the chain filled with bookkeeping. Runes was designed as a leaner replacement that encodes token data in a compact output and tracks balances natively, so a transfer costs a fraction of what the old method did.

The efficiency argument matters more than it sounds. A cheaper standard means more people use it, which is precisely what critics feared and what supporters wanted.

Runestone and How Leonidas Became a Central Figure

Runestone was one of the largest and most widely distributed airdrops the Ordinals ecosystem has produced. Rather than selling allocations to funds, it pushed ownership out across a very wide base of wallets, which is how a project earns durable community loyalty in this part of crypto. Leonidas co-founded it, and he later seeded DOG, the token that grew out of that distribution and that anchors much of the Runes market today. 

Wide distribution is the whole reason he has leverage now. Leonidas does not control a treasury that can outbid opponents. He has an audience, and audiences show up when a proposal needs support.

Why Any of This Is Contested

Bitcoin was described in its original whitepaper as a peer-to-peer electronic cash system. That sentence is scripture to a large part of the community, and inscriptions violate the spirit of it in their eyes. Blocks are finite. Every kilobyte of JPEG is a kilobyte unavailable for a payment, and when demand rises everybody pays higher fees, including the person trying to send money to family abroad. Critics call inscriptions spam and they mean the word literally rather than as an insult.

The other side has an answer worth hearing. Blockspace is neutral and it is auctioned by fee, so anyone paying the market rate has an equal claim on it, and no rule in Bitcoin says a transaction must be a payment to be valid. Filtering by intended use case means someone has to judge which transactions deserve to exist, which supporters view as censorship arriving through the back door. They also point out that inscription activity brought real fee revenue to miners during a period when the block subsidy keeps halving.

Both arguments are coherent, which is why the fight has lasted three years instead of resolving.

What DOG Mode Actually Proposes

DOG Mode is a Bitcoin client change rather than a rewrite of Bitcoin's rules. It relaxes the relay policy that Bitcoin Core applies by default, permits transactions close to the full block size, and cuts the dust limit down to 1 satoshi.

The dust limit is the piece that carries the money. Bitcoin's default policy treats very small outputs as uneconomic and discourages relaying them, so Ordinals and Runes transactions have long been forced to attach padding, meaning extra satoshis bundled alongside the data purely to clear that threshold. Those satoshis sit locked across the ecosystem doing nothing. Dropping the limit to 1 satoshi would release an estimated $25 million of that padding back into circulation.

DOG Mode is also a direct counter to BIP-110, an anti-spam proposal heading toward an August 2026 soft-fork showdown that aims to limit non-payment data on Bitcoin. The two proposals point in opposite directions. One would make inscriptions cheaper, and the other would make them harder.

The Asymmetry That Probably Decides It

Here is the part that matters more than any argument about what Bitcoin is for.

Soft forks require broad coordination because they change what the network will accept as valid, and BIP-110's 55% threshold has drawn essentially nothing. A relay policy change requires no coordination at all. If a single miner runs a client that accepts these transactions, they get mined, and the rest of the network validates them normally because nothing about their validity changed.

Leonidas was losing the argument and found a procedural route around it. On July 19, 2026, Michael Saylor added weight to that side by publishing a 110-point essay urging Bitcoin to reject BIP-110 and calling it a bad idea, which matters because Saylor's Bitcoin position makes him one of the loudest voices the payments-purist camp would rather have had on its side.

The case against Leonidas is not that he broke a rule. He did not. The case is that congesting a payment network for speculative collectibles raises costs for ordinary users, and that routing around a governance process rather than winning it sets a precedent someone will eventually use for something worse. Both charges deserve to be taken seriously, and neither has an obvious rebuttal.

What This Means for the Ordinals Token Complex

The Ordinals and Runes token group has direct exposure to how this resolves. Cheaper inscriptions mean more activity, and more activity has historically meant higher valuations across the theme. A successful BIP-110 would cut the other way.

ORDI is the tradeable expression of that theme on Phemex. Be clear-eyed about what that means. DOG is not listed on Phemex, so ORDI is a proxy for the Ordinals narrative rather than the same asset, and proxies break correlation exactly when you need them most. ORDI can move on its own supply dynamics while DOG moves on Runes-specific flows. Size the position for that gap rather than assuming the two trade as one.

Broader crypto conditions are not doing much to help either direction right now, with BTC flat and the market showing the same low-conviction tone visible across DeFi activity generally.

Frequently Asked Questions

What are Bitcoin Ordinals in simple terms?

Ordinals number every satoshi so individual units can be told apart, then let you inscribe data such as an image or text onto a specific one. The result is a collectible that lives entirely inside Bitcoin's own blocks with no external hosting and no second chain involved.

Is Leonidas his real name?

Leonidas is a pseudonymous handle, and there is no verified public identity behind it. That is ordinary in Bitcoin development, where the network's own creator remains anonymous, and it means the honest way to evaluate him is by what he has built and argued rather than by biography.

What is the difference between Ordinals and Runes?

Ordinals are for unique one-of-one items, similar in spirit to NFTs. Runes are for fungible tokens where every unit is identical, and Runes was engineered to be far cheaper per transfer than the earlier token methods people used on Bitcoin.

Will DOG Mode actually happen?

It needs only one miner to run the client, which is a much lower bar than the 55% signaling BIP-110 requires and has not come close to reaching. The realistic question is not approval but which mining operation moves first and how the rest of the network reacts once transactions start confirming.

The Bottom Line

Watch miner behavior, not the discourse. BIP-110 heads into its August 2026 window with roughly zero signaling against a 55% requirement, which means the soft fork is failing on arithmetic before anyone argues the merits. DOG Mode needs one operator, so the trigger to watch is the first mining pool announcing support, and that announcement would be the actual event rather than any further essay from either camp.

For traders, the honest framing is that this is a narrative catalyst with a proxy instrument attached. ORDI moves on Ordinals sentiment and DOG is not available here, so treat any position as an expression of the theme rather than a clean bet on the outcome. The larger lesson is about Bitcoin itself. What Bitcoin becomes is decided less by what people believe it is for and more by which change requires the fewest people to say yes.

This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency trading involves substantial risk. Always conduct your own research before making trading decisions.