A recent study by a16z crypto reveals that stablecoins facilitated roughly $46 trillion in transactions over the past year. In addition, crypto trading platforms collectively handled over $80 trillion in volume during the same period.
Considering broader financial transaction trends, stablecoins represent a modest, single-digit percentage of overall global settlement volume. However, they are gaining traction, particularly for specific applications such as international money transfers and round-the-clock treasury management.
When compared to the estimated $2 quadrillion in global payments processed in 2024, stablecoins accounted for approximately 2.3% of worldwide transaction flows, based on direct flow comparisons.
This comparison methodology ensures consistency and avoids comparing unrelated metrics, such as transaction flows against total money supply.
For those interested in a different perspective, dividing the $46 trillion stablecoin volume by the U.S. M2 money stock (approximately $22.195 trillion as of August 2025) results in a ratio of approximately 207%. It’s crucial to remember that these figures represent different measurements and shouldn’t be interpreted as a direct percentage of total U.S. dollars.
According to data from FRED and a McKinsey report, stablecoins are now a significant element in the discussion around modern payment systems, based on transaction volume.
Looking at U.S. benchmarks, stablecoin volume remains smaller than wholesale wire transfers and is roughly half the size of the automated clearing house (ACH) system on an annualized basis.
The Federal Reserve’s Fedwire Funds Service processed about $1.133 quadrillion in 2024, while Nacha’s ACH system, annualized from the third quarter of 2025, saw volumes close to $93 trillion.
These figures highlight the current position of stablecoins in the payment landscape and suggest potential growth depending on policy changes and wider adoption.
| Rail / Metric | Value | Timebase | Source |
|---|---|---|---|
| Stablecoin settlement (TTM) | ~$46T | Trailing 12 months, 2025 | a16z crypto |
| ACH value (annualized) | ~$93T | Q3 2025 run-rate | Mastercard |
| Fedwire Funds value | ~$1.133Q | Full year 2024 | FRBservices |
| Global payments value | ~$2.0Q | Full year 2024 | McKinsey |
Analyzing the existing monetary base offers a valuable viewpoint on the impact of tokenized dollars.
Given an average stablecoin circulation of between $250 billion and $300 billion over the last year, the tokenized portion represents slightly more than 1% of the M2 money supply.
This aligns with the understanding that stablecoins function as instant-settlement mechanisms linked to money market reserves rather than traditional deposits, which has implications for the Treasury market. Reserve composition tends to favor short-term Treasury bills. The key elements are the float (circulation) and its turnover rate.
Velocity reflects the intensity with which each on-chain dollar is transacted.
Dividing the $46 trillion in transfers over the past twelve months by an average float of $250 billion to $300 billion suggests an annualized turnover rate of approximately 150 to 185 times. This figure provides general context, but it’s important to note that internal transfers, exchange wallets, and automated processes can inflate the counts.
Refined transfer methodologies, such as a16z’s method of netting internal movements, may help to narrow the divide between total and actual economic volume.
According to a16z crypto, tracking both raw and adjusted series is a more accurate way to assess adoption across different areas, including retail transfers, B2B payments, and exchange settlements.
Regulatory frameworks are increasingly defining how these transactions interact with the traditional financial system. The U.S. GENIUS Act, which became law in July, creates a federal structure for reserve management, licensing, and disclosures for issuers that banks and payment processors can leverage.
The legislation provides specific guidelines for regulatory timelines and establishes a baseline for supervised issuance, custody, and reporting. The behavior of stablecoin issuers is already gravitating toward regulatory compliance.
Reserve management also involves the Treasury market. Stablecoin issuers collectively hold over $150 billion in U.S. Treasury bills, making the sector a significant marginal buyer of short-term debt.
If the stablecoin float expands due to new distribution channels, the resulting demand for T-bills becomes a function of growth and reserve policy, rather than an optional investment decision. This relationship is drawing attention from rate desks and public sector observers who are monitoring bill supply.
Distribution represents the secondary force powering the throughput figures.
Payment networks, processors, and corporate wallets are integrating on-chain settlement into checkout processes, supplier payments, and remittance systems. Often, stablecoins are used only for the interbank component, while user interfaces remain familiar.
Various dollar-denominated stablecoins are now supported across Mastercard’s network through select pilots and initiatives, expanding acceptance possibilities without needing users to modify their behavior.
This approach, coupled with lower fees and faster transaction times on underlying blockchains, is contributing to the overall throughput figures more than speculative trading activity alone.
Stablecoin payment flow modeling
Future scenarios through 2027 hinge on three key factors: the pace of policy implementation, the depth of distribution, and reserve policies.
A standard path with normalized U.S. regulation and greater fintech integration suggests a stablecoin float between $450 billion and $650 billion, with trailing-twelve-month transfers near $70 trillion to $90 trillion. This would translate to a 3% to 4.5% share of global payment value, assuming historical growth of the McKinsey denominator.
A scenario with higher adoption, including payroll, merchant settlements, and issuance by supervised U.S. banks, would push the float toward $800 billion to $1.2 trillion, with $110 trillion to $150 trillion in annualized transfers and a 5% to 7% global share. T-bill holdings could reach $300 billion to $500 billion if reserve policies continue to favor bills.
A slower path, caused by stricter filtering of non-economic transfers and delayed on-ramp rules, would leave the float in a $350 billion to $450 billion range, with throughput near $50 trillion to $60 trillion, maintaining a global share closer to 2.5% to 3%.
These projections are directional and should be evaluated using adjusted transfer series to minimize the impact of internal wallet activity.
Flow metrics can incorporate internal transfers and automated strategies that may not reflect actual economic activity. In addition, the timing of data from various sources may differ, with global payments data anchored in 2024 while stablecoin data is trailing and current.
Clearly distinguishing between flow and stock metrics, and comparing raw data with adjusted data, helps to avoid overstating adoption while still showcasing the scale of settlement now facilitated on public blockchains.
According to a16z crypto, using a combination of adjusted volume and wallet cohort analysis is the best method for assessing new use cases.
Regulatory clarity is shaping issuer strategies. Tether has announced plans for a U.S.-regulated USA₮ product, to be issued under the new framework. Anchorage Digital will serve as the issuing entity.
What does this mean for Bitcoin and crypto?
For markets, a $46T transaction volume, representing a ~2.3% share of global payment value processed through “dollar tokens,” indicates that the dollar component of the crypto ecosystem is growing significantly, which is beneficial for BTC/ETH liquidity.
For Bitcoin, larger stablecoin reserves on exchanges and among market makers reduce friction with traditional currencies and tighten spreads. This tends to increase spot/perp volumes and improve price discovery during periods of risk appetite.
For Ethereum, stablecoins are a primary consumer of blockspace, particularly on layer-2 solutions. Greater payment throughput generally leads to higher fee revenue, a greater likelihood of token burning under EIP-1559, and a clearer link between payment activity and ETH cash flows and supply dynamics.
If policies continue to expand distribution through banks, payment processors, and enterprise wallets, stablecoin float and turnover could become a leading indicator of the next wave of BTC demand and a structural boost for the Ethereum network’s economics, while also reducing some volatility as on-chain dollars provide round-the-clock liquidity during macro shocks.
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