What is ₿C?
₿C (Bitcoin Currency) is a denomination of Bitcoin whose fiat-equivalent price on any given day is the arithmetic mean of every historical Bitcoin price from the genesis block (January 3, 2009) through the previous completed day.
It is not a token. It is not a stablecoin. It is not a new protocol. It is a unit of account , a standard for expressing value that is derived from Bitcoin's entire USD price history, requires no institution to maintain it, and appreciates incrementally as that history accumulates. ₿C is dollar-derived , its inputs are daily USD prices , which makes it structurally suited to serve as the common unit of account between the fiat economy and the Bitcoin economy.
Where N is the total number of days in Bitcoin's history through the previous completed day, and BTCADP(i) is the Bitcoin Average Daily Price for each day. The price updates once per day at midnight UTC and is locked for the following 24 hours.
The Problem It Solves
Bitcoin works. The network has operated continuously since January 2009. Lightning provides throughput. Settlement is secure and final. Yet Bitcoin has not achieved widespread adoption as a medium of everyday exchange. The barrier is not technical , it is that Bitcoin's fiat-denominated price is volatile, making it impractical for the daily commerce that constitutes most economic activity.
Stablecoins emerged to fill this gap, but in doing so they reintroduce the trust dependencies Bitcoin was designed to eliminate: centralized issuers who can freeze accounts, reserves that must be audited, and continued operation of entities subject to regulatory risk. Algorithmic approaches have demonstrated catastrophic failure modes.
Mathematical Properties
The day-to-day stability and long-run appreciation of the ₿C price are not maintained by market incentives or policy decisions. Both follow directly from the mathematics of cumulative averages. As of early 2026, the ₿C price incorporates over 6,200 daily observations. The sensitivity of the price to any single new day is exactly 1/(N+1) of the difference from the current average.
Each new day has less influence than the last. The denomination becomes more stable permanently and irreversibly with every passing day.
With N > 6,200, no single day can move the ₿C price by more than ~0.016% of the shock's magnitude, regardless of how extreme.
Sustained BTC price levels are absorbed into the ₿C price slowly and permanently. As long as Bitcoin's long-run trajectory is upward, ₿C appreciates , gradually, predictably, and irreversibly.
Example:
| Market Event | BTC Spot Impact | ₿C Price Impact |
|---|---|---|
| Flash crash, BTC falls 10% in one day | −10% | < 0.01% |
| Severe crash, BTC falls 40% in one day | −40% | ~0.04% |
| Bear market, BTC at $20,000 for 3 years | −78% | < 5% total |
| Bull run, BTC rises to $500,000 over years | +450% | Slow, steady, permanent appreciation absorbed into the average |
Stability, Movement, and Purchasing Power
₿C moves. It appreciates approximately 0.04% per day. The natural question follows: if a unit of account moves, is it not deficient? The standard assumption is that a unit of account should be stationary. One dollar is always one dollar.
But one dollar is not always one dollar. The number on the price tag stays the same. The purchasing power behind that number quietly erodes. The Federal Reserve targets 2% annual depreciation as policy. In practice, the rate is unpredictable: 1.2% in 2020, 7.0% in 2021, 6.5% in 2022, 3.4% in 2023. The dollar's purchasing power is in constant motion, always downward, at a rate determined after the fact by a discretionary authority. The movement is real. It is just not visible on the price tag.
A unit of account exists to express value. Value is purchasing power. If the purchasing power of the dollar erodes, the unit of account is degrading, even though the number on the price tag has not changed. The $5 coffee is still labeled $5. But that $5 buys less of everything else than it did last year. The apparent stability is in the label. The instability is in the substance. Inflation is not a side effect of the dollar's stability. It is the expression of the dollar's instability, made invisible by nominally flat price tags.
₿C makes the opposite trade-off. The number on the price tag visibly changes, slowly, predictably, in a direction that benefits the holder. No unit of account is perfectly flat. Every unit of account moves in purchasing power. The question is not whether the unit moves. It is whether the movement is transparent or opaque, predictable or discretionary, beneficial or harmful to the people using it.
The practical implication for merchants is that ₿C-denominated prices require periodic downward adjustment, the mirror image of the upward price adjustments every fiat-denominated merchant already makes. The difference is that the ₿C adjustment is calculable in advance, while the fiat adjustment is reactive. Both merchants adjust. One does it proactively with full information. The other does it reactively without it.
Timeblocks
Each UTC day constitutes a timeblock: a single day's BTCADP value that, once the day closes, is permanently recorded into the cumulative average. Once a timeblock enters the average, it cannot be significantly altered or removed.
Like a block on the blockchain, a timeblock becomes more immutable over time , not because it is buried under computational work, but because it is buried under subsequent timeblocks. Each new day added to the cumulative average dilutes the influence of every previous day. The oldest timeblocks , the Era 0 days at $0.00, the early exchange trading days , are now as permanent a feature of the ₿C price as the genesis block is of the blockchain.
Three Dimensions of Bitcoin
Bitcoin's network can be understood through three dimensions that together form a complete record of what happened, why it cannot be undone, and what it was worth.
Encode what happened
Ensures it cannot be undone
Records what it was worth
Historical Eras
Bitcoin's price history spans multiple periods with different data characteristics. The BTCADP specification defines four eras, all of which feed into the ₿C cumulative average.
| Era | Date Range | Data Source | Status |
|---|---|---|---|
| Era 0 | Jan 3, 2009 – Jul 17, 2010 | No market existed | BTCADP = $0.00 by definition |
| Era 1 | Jul 18, 2010 – Feb 24, 2014 | Mt. Gox VWAP | Single-source, flagged |
| Era 2 | Feb 25, 2014 – Dec 31, 2017 | Multi-exchange trimmed mean | Reduced → Full confidence |
| Era 3 | Jan 1, 2018 – Present | Multi-exchange trimmed mean | Full confidence |
The ₿C price incorporates all 561 days of Era 0 at $0.00. This is not a claim that Bitcoin was worthless , it is a recognition that no market-based price discovery mechanism existed. Including these days in the average is what gives the ₿C its historically grounded, deeply anchored baseline.
Implementation
₿C requires no changes to the Bitcoin protocol. No soft fork, no hard fork, no new opcodes. The denomination operates entirely in the calculation layer , it defines a unit of account, not a transaction mechanism.
Any wallet, merchant, or payment system can adopt ₿C independently by implementing its own conversion logic against a single daily price that updates at midnight UTC. The price is deterministic, publicly verifiable, and reproducible by any party with access to the BTCADP specification and trade data.
Built on ₿C
Because ₿C is a deterministic, publicly verifiable unit of account , and because it is derived from USD prices , it naturally bridges the fiat and Bitcoin economies. A fiat participant reads ₿C as a dollar amount. A Bitcoin participant reads it as a sat equivalent. A merchant sets one ₿C price tag and both customers understand it. This bridging function persists for as long as fiat and Bitcoin coexist, which is the foreseeable future.
Treasury-Backed Digital Currency (₿USD) is one such product , a USD-pegged stablecoin that uses the ₿C price as its collateral floor. It is described separately.
Learn about ₿USD →Read the Full Technical Paper
The complete ₿C specification, including mathematical proofs, stability analysis, manipulation resistance, and implementation guidance.