Every price scenario in this series has been calculated against circulating supply — approximately 61.7 billion XRP. That number is the right place to start. It is not the right place to stop. Circulating supply means one specific thing: XRP not currently locked in Ripple's programmatic escrow. It does not mean XRP available to do productive settlement work. The difference between those two definitions is the most important supply-side fact the series hasn't yet examined directly.
Where earlier notes defined the size of the required pipe, this note defines how much of the pipe exists today. Productive float — defined precisely as XRP actively available for immediate settlement execution within institutional slippage constraints — is the relevant denominator for sizing real settlement capacity. It is not circulating supply.
This note uses confirmed on-chain data to map where every meaningful category of XRP actually sits today, identifies the fraction that is genuinely doing productive work as settlement infrastructure, and then models what happens to that fraction — and to settlement capacity — as price appreciates through a series of economic activation thresholds. The picture that emerges is both more sobering and more structurally bullish than the full circulating supply framing suggests.
Where the XRP actually is
One hundred billion XRP were created at genesis. Not a single additional token can ever be minted. The question is not how many exist. The question is what each category is doing right now — and whether it is contributing to the settlement pipe the framework is sizing.
The productive working float is approximately 5–8 billion XRP. That is the pipe as it exists today. Not 61.7 billion. Not 100 billion. Five to eight billion XRP consistently available for settlement execution — everything else is either locked, dormant, or waiting for conditions that haven't arrived yet.
Circulating supply means not in escrow. It does not mean available to widen the pipe. The difference between those two definitions is approximately 54 billion XRP.
What the current pipe can actually carry
At $1.38 per XRP and 6 billion productive working float, the effective market cap doing settlement work is approximately $8.3 billion. Applying the framework's standard turnover assumption of 1% daily, the settlement throughput capacity of that working float within institutional slippage tolerance is calculable directly.
Layer 1 of the framework requires ~$49B/day. Layer 2 requires ~$301B/day.
The gap between $82M and $49B is not a failure of the thesis. It is the thesis.
Eighty-two million dollars per day. That is what the system can handle today at institutional slippage tolerances. Actual turnover may exceed this during periods of high activity — but 1% provides a conservative baseline for institutional-grade execution planning and is consistent with the framework's prior scenario math. It is not nothing — ODL corridors are operating, settlements are clearing, the infrastructure is real. But it is also not Layer 1. It is pre-ignition. The pipe exists. It is not yet wide enough to carry institutional flow at scale.
The confirmed live data makes this more precise. Today's 24-hour trading volume is approximately $1.55 billion against a total market cap of $85.4 billion — a turnover rate of 1.81% against total circulating supply, already exceeding the framework's 1% conservative assumption. But against the productive working float of $8.28 billion, the same $1.55 billion represents a daily turnover rate of approximately 18.7%. Nearly one dollar in five of productive float is turning over every day at current prices. The productive float is not sitting idle — it is already working at high intensity. What it cannot do is scale to institutional settlement volumes at $1.38. The pipe is not underutilized. It is running near capacity for the flows it currently serves. Price appreciation does not increase utilization of the existing pipe — it widens the pipe to serve a class of transaction that cannot enter at current depth.
This explains something the framework previously couldn't account for cleanly: why ODL volume has grown without proportional price appreciation. The productive working float has been absorbing early corridor growth at current prices. It has headroom — but that headroom has a ceiling. The ceiling is approximately $82M per day at current price and current productive float. Layer 1 adoption breaches that ceiling. When it does, price must move — not as a speculative event, but as a mechanical requirement of the slippage constraint.
The activation curve — where dormant supply becomes productive
The productive working float is not fixed. It is a function of price. As price rises through a series of economic thresholds, dormant supply activates into productive use. Retail holders deploy into AMM pools. Whale cold storage becomes lending collateral. Institutional LP economics shift. Exchange custody reactivates. Each threshold adds meaningfully to the productive float, which deepens settlement capacity, which supports higher price, which activates the next tier.
Four activation tiers are identifiable from the supply data and current XRPL infrastructure. The thresholds are not arbitrary — they reflect specific economic conditions at which productive deployment becomes rational for each holder category.
What the system looks like at each threshold
Running the settlement capacity calculation across the activation curve shows the system's capacity at each price tier — and where it crosses the framework's adoption scenario thresholds.
The self-correcting mechanism — and its limit
The activation curve reveals something the framework's original price scenarios couldn't capture: for the lower adoption layers, the system is self-calibrating. Price rise activates dormant supply. Activated supply deepens productive float. Deeper productive float expands settlement capacity. Greater settlement capacity supports higher price. Higher price activates the next tier of dormant supply. For Layers 1 and 2 — the retail, remittance, and early ODL corridor flows made up of BBs and golf balls — this cycle compounds continuously. The activation curve in this note describes that dynamic precisely.
But the series has always argued something different governs the upper layers. Part III establishes that institutional adoption does not flow gradually into a widening pipe. Institutions make a binary decision — use the rail or don't. When they decide to use it, the pipe must already be wide enough for their ticket size at the moment of execution. A $2 billion derivatives settlement does not trickle through a narrow pipe and widen it on the way. It either passes through a pipe already sized for it or it does not enter at all. For Layers 3, 4, and 5 — the institutional and derivatives flows — price does not rise gradually in response to increasing flow. It jumps discontinuously at adoption thresholds, because the required depth must be present before the flow attempts passage.
These two dynamics are not contradictory. They govern different parts of the same system. The continuous self-correcting mechanism operates in the lower layers and prepares the system — deepens the float, attracts market makers, establishes infrastructure — for the discontinuous repricing events that occur when upper-layer institutional adoption thresholds are crossed. The gradual activation curve is what makes each discontinuous jump possible. Without it, the pipe would never be wide enough for the bowling balls to attempt entry.
This is structurally important because it means the required price to support lower-layer settlement volume is lower than a static supply analysis implies — the system self-calibrates continuously through the activation tiers. But the required price to support upper-layer institutional adoption is not governed by the same continuous mechanism. It is governed by the slippage constraint in Part I, which requires the full pipe width to be present at the moment of institutional decision. The activation curve gets the system to the threshold. The discontinuous repricing event is the threshold being crossed.
For the flows the system currently serves, the water flowing is what builds the pipe. For the flows it cannot yet serve, the pipe must be wide enough before the water will flow at all. Both are true. They apply to different layers.
There is also a natural governor in the lower-layer mechanism. As productive float grows with price, the marginal price required for the next unit of lower-layer settlement capacity falls. The system doesn't require exponentially higher prices to achieve exponentially higher capacity in Layers 1 and 2 — the activation of dormant supply does part of the work that price would otherwise have to do alone. This is why the series' mid-range price scenarios are more accessible than the upper scenarios. The supply structure favors the lower layers. The upper layers require the discontinuous repricing argument to hold — and that argument does not depend on the activation curve. It depends on whether institutions adopt.
Price doesn't unlock value. Price unlocks participation.
What to watch
The activation curve gives the framework a new set of observable signals — not adoption signals from Ripple's partnerships or regulatory developments, but supply signals from on-chain data that indicate which tier the system is entering.
The first signal is the retail AMM activation threshold. Watch XRPL AMM pool total value locked. When TVL begins growing faster than price appreciation — meaning the pool depth is increasing in XRP terms, not just dollar terms — retail holders have begun deploying rather than holding. That is the $10-$20 activation tier beginning to fire.
The second signal is whale collateral utilization. Watch XLS-66d lending protocol volume and outstanding loan balances on XRPL. When large wallets begin borrowing against XRP positions rather than selling them, the $20-$50 tier is activating. This is detectable on-chain and is the most important single signal for productive float expansion without sell pressure.
The third signal is exchange hot wallet depth recovery. Exchange reserves are currently at five-year lows — 1.66B XRP. If that number begins rising while price is also rising, it means new supply is entering the productive float from the cold storage and custody categories. That is the later activation tiers beginning. If exchange reserves rise while price falls, that is distribution — a different and bearish signal entirely.
The fourth signal is the capacity ceiling breach. When ODL daily volume in a single corridor begins approaching $80M per day on a sustained basis, the current productive float's settlement capacity is approaching its limit. That is the moment the square root law's price requirement reasserts itself — not as a future projection, but as a present mechanical constraint. Watch for it. It is the ignition point the framework has always been describing.
The system is not waiting for price to rise. It is waiting for the current price to run out of capacity.
The square root market impact law and slippage constraint established in Part I govern what price the productive working float must be at to support any given settlement flow. The discontinuous repricing argument in Part III establishes that institutional adoption fires at thresholds, not gradually — the pipe must be wide enough before institutions will route flow through it. This note's activation curve describes how the pipe gets wide enough for each threshold to be crossable. The two arguments are sequential, not competing. The equilibrium band in Field Note 5 describes the range within which LP economics make inventory deployment rational — that band now has a supply activation dimension the original note did not model. The Q-sensitivity table in Field Note 6 shows how required price varies by fragmentation assumption — the productive float analysis shows that the effective Q is also a function of which supply tiers have activated. All of it is the same system viewed from different angles.
Start with Part I → Part III — Discontinuous repricing → Part VI — The probability framework →