Runes launched at the April 2024 Bitcoin halving. Same author as Ordinals (Casey Rodarmor), different design goal: a fungible token standard that fits Bitcoin's UTXO model natively and does not require indexer trust the way BRC-20 does.
Why Runes over BRC-20
BRC-20 uses Ordinals inscriptions to declare balances. Each transfer requires a new inscription. This means every wallet needs an off-chain indexer to know balances. It works but it is slow, inefficient, and depends on trusted indexers.
Runes design
Runes writes token operations directly into the OP_RETURN of Bitcoin transactions. Balances live in UTXOs, exactly like BTC. A UTXO can hold both BTC and some quantity of a Rune. When you spend the UTXO, the Rune moves too.
What Runes enables
- Any Bitcoin wallet with a Runes upgrade can display balances without an external indexer.
- Rune transfers are as fast as any Bitcoin transaction.
- Meaningfully lower footprint than BRC-20.
Launch mania
The Runes launch on halving day (April 20, 2024) created a fee spike that briefly pushed the average Bitcoin transaction fee above $100. Some Runes minted at halving-block priority commanded thousands of dollars in fees per mint. The market normalized within weeks.
Where Runes fits
- Meme tokens on Bitcoin.
- Community projects that want Bitcoin settlement without an alt L1.
- Institutional experiments with Bitcoin-native fungibles.
Trade-offs
- Bitcoin is not a smart-contract chain. Runes do not do lending, LP, or complex DeFi.
- Fees still hit Runes users during Bitcoin congestion.
- Ecosystem far smaller than Ethereum ERC-20s.
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