Bitcoin’s earliest realistic path to becoming the world’s global reserve currency (defined here as the primacy of the reserve currency rather than limited adoption of reserve assets) is around the mid-2040s under a scenario model that treats official mandates, the use of collateral, and billing conventions as binding constraints.
That timeline starts of a reserve system in which total global foreign exchange reserves reached US$12.94 trillion in the second quarter of 2025 and the US dollar still accounted for 56.32% of allocated reserves.
The same IMF series shows why a turnaround on a ten-year scale is difficult to model with much confidence, even with rapid private adoption. The denominator is large and changes slowly.
In the first quarter of 2025, the IMF put down the US dollar at 57.74% of the allocated reserves, the euro at 20.06% and the renminbi at 2.12%. These figures provide a framework for the distribution of the ‘safe’ reserve balances that central banks already use.
Reserve currency status too traces the financing and hedging ecosystem behind reserve portfolios. The dollar was on one side of 88% of global currency transactions in April 2022.
The collateral core of that network remains US government bonds.
There were about $30.3 trillion outstanding and about $1,047.1 billion in average daily trading volume, according to SIFMA’s U.S. Treasury Bond Statistics in the January 2026 update.
Two steps: reserve asset adoption versus reserve currency primacy
The issue of Bitcoin’s reserve currency therefore consists of two separate steps that the markets often summarize in one story. The first is a ‘reserve asset breakthrough’, where official institutions and regulated intermediaries treat BTC as a diversifier for long-term reserves of limited size.
The second is the ‘primacy of the reserve currency’, where BTC becomes a standard unit for billing, settlement, collateral and liquidity provision across borders.
The IMF’s dominant currency framework describes why billing and contract conventions can persist even as trading stocks move, because pricing and financing habits can reinforce themselves in stress and normal times.
That persistence is outlined in the IMF staff discussion paper, “Dominant currencies and external adjustments”.
Policy and market research now in development can also raise the bar for that second step. It can expand dollar use to new rails instead of moving it.
That’s what the BIS said Project Agora explores the tokenization of wholesale central bank money and commercial bank deposits on programmable platforms for cross-border payments. That points to a future where major currency settlements and bank balance sheets remain the main ‘money object’, even as the interface changes.
Citi, in its 2025 stablecoin outlook, has revised its 2030 emissions forecasts to $1.9 trillion in a base case and $4.0 trillion in a bull case.
McKinsey has separately framed the tokenization of real assets, excluding cryptocurrencies and stablecoins, at about $2 trillion by 2030. It estimates a range of about $1 trillion to $4 trillion, reinforcing the scale of balance sheet migration that can occur without changing the unit of account for reserves.
Access is expanding, but official restrictions remain
Regulated access to Bitcoin has expanded. This removes one barrier to broader reserve asset ownership, while leaving the reserve currency barrier intact.
The SEC approved 11 spot Bitcoin ETP Rule 19b-4 filings on January 10, 2024. That created a standardized wrapper for US investors and some institutions that cannot hold BTC directly.
Secondary market measures indicate rapid growth of these wrappers. Cumulative trading volume for spot crypto ETFs in the US is above $2 trillion, and spot Bitcoin ETF assets are approximately $117 billion as of January 2, 2026.
That data point is more important as an adoption channel than as a direct indicator of state reserve intent. For more information on AUM and market positioning, see spot Bitcoin ETFs celebrating their first anniversary with four in the top 20 in AUM.
The short-term behavior of central banks also points to a competitive diversification channel that already meets the constraints of reserve managers. The World Gold Council reported that central banks bought about 1,045 tons of gold in 2024, the third year in a row above 1,000 tons.
The 2025 survey shows that 95% of respondents expect global gold reserves to rise, while a record 43% expect their own gold reserves to rise over the next twelve months. Those findings have been published in the WGC’s gold demand for 2024 (central banks section) and the WGC Central Bank Survey 2025.
This observable flow limits any model that assumes official diversification will default on BTC in the near term. Instead, it competes with a reserve asset for which accounting and liquidity conventions already exist.
A limited model points to an earliest period around 2046
A forward-looking estimate for Bitcoin as a ‘global reserve currency’ therefore depends on gates opening in succession.
These include volatility compression suitable for reserve portfolios, legal and regulatory standardization for final custody and settlement, and deeper collateral and funding markets that can function under stress.
They also include official sector mandates that go beyond token allocations. Finally, they require a shift in billing, settlement, or collateral practices away from the dollar’s current base.
The moat these gates must cross is visible in macro data, including the dollar’s share of reserves, its position in currency markets and the size of government bond collateral. These restrictions are based on COFER, the BIS FX survey and SIFMA’s Treasury market statistics.
Based on these constraints, our scenario model assigns an “earliest plausible window” for reserve currency primacy around 2046.
It separates this from the previous possibility of BTC becoming a small reserve in some wallets.
The probability table below considers reserve currency primacy as the intended outcome. It explicitly describes the figures as editorial models rather than based on predictions.
| Horizon | Probability of BTC becoming global reserve currency (primacy) by then (editorial model) | Model anchors tied to observable constraints |
|---|---|---|
| 5 years (2031) | 1% | Access to ETP exists, but reserve manager requirements and official mandates rarely change within a cycle, while the USD reserve share and currency dominance remain high (CRS; IMF COFER 2025Q2; BIS FX Survey). |
| 10 years (2036) | 4% | Tokenized deposits and USD-denominated stablecoins can scale on programmable rails, amplifying existing currency uses even as settlement technology changes (BIS Project Agorá; Citi stablecoin framework). |
| 20 years (2046) | 15% | Multi-cyclical regulatory convergence and maturation of financing markets could increase, although the Treasury collateral base and currency network effects remain high (SIFMA Treasury statistics; BIS FX survey). |
| 50 years (2076) | 35% | Long horizons enable institutional rewiring, while the persistence of the dominant currency in invoicing and contracting remains a structural headwind (the IMF dominant currency framework). |
| Never | 45% | Structural barriers include the lack of an issuer backstop for stress operations and the possibility of tokenized USD systems absorbing most of the demand for digital money (BIS Project Agorá; Citi stablecoin framework). |
The use of dollars in cross-border payments and trade financing also remains a relevant constraint in models of currency primacy, although definitions matter. The Wall Street Journal cited SWIFT data places the dollar at around 47% of payments and around 80% of trade finance.
These figures are indicative without the underlying SWIFT release in hand.
What emerges from the combined data is a split between fast-moving channels that can increase Bitcoin exposure and slow-moving channels that define reserve currency status.
Tokenized bank money and stablecoins could reach a trillion dollar size within a decade, while dollars and bank deposits remain central to settlement, according to the BIS and Citi line-up.
According to the World Gold Council and COFER, central banks can continue to add gold as a balance sheet hedge while keeping the dollar at the core of foreign exchange reserves. These limitations make 2046 an “earliest period” for precedence in this model, rather than an average outcome.
They also keep the short-term story focused on whether Bitcoin can evolve into a collateral and liquidity infrastructure that reserve managers can maintain despite stress.
