Africa’s next monetary policy challenge may not originate in a domestic banking crisis or a sudden shift in global interest rates. It could emerge from the growing use of digital dollars that allow households and businesses to hold and transfer value outside conventional banking channels.
The adoption of dollar-denominated stablecoins, cryptocurrencies engineered to minimise price volatility, is increasingly being promoted as a solution to Africa’s expensive, slow and fragmented cross-border payment systems.
However, beneath these benefits lies a more consequential development. Stablecoins could change where African savings are held, how domestic banks finance lending and how effectively central banks influence monetary conditions. They could also deepen the reach of the US dollar into economies whose monetary authorities are working to strengthen domestic currencies and financial resilience.
The question for African policymakers is therefore not simply whether stablecoins make payments more efficient. It is whether the risks associated with their adoption are being transferred beyond the reach of national regulators and whether Africa is prepared for the consequences.
Stablecoins are digital tokens designed to maintain a relatively stable value against an underlying asset, most commonly the US dollar.
Their issuers typically hold reserve assets, which may include cash, bank deposits and short-term US Treasury securities, to support redemption at the promised value.
As the market grows, stablecoins can create an additional channel for international demand for dollar-denominated assets. For the US, a larger stablecoin market can strengthen the international reach of the dollar and potentially support demand for US government securities.
The scale of any additional demand depends, however, on where stablecoin funding originates and how issuers manage their reserves.
For African economies, the more immediate concern is the possibility that digital access to dollars could accelerate currency substitution. Where confidence in domestic currencies is weak, stablecoins may offer households and businesses a convenient means of holding dollar-denominated value without relying exclusively on traditional foreign-currency accounts.
This is not merely a technological shift. It could gradually change the relationship between domestic money, savings and economic activity.
So, what should African central banks watch out for?
The first question is whether stablecoins are primarily being used for payments or increasingly as a store of value. A business receiving digital dollars and immediately converting them into local currency creates a different monetary exposure from one retaining its revenues, savings and working capital in dollar stablecoins.
As access becomes easier, currency substitution could accelerate, particularly in economies already experiencing inflation or exchange rate instability.
The second concern is the potential impact on domestic banking systems. If businesses and households increasingly hold dollar stablecoins instead of local bank deposits, this could affect deposit funding, credit availability and monetary policy transmission. The impact depends on where the underlying funds ultimately sit, but central banks need to understand whether financial activity is migrating away from domestic institutions and how this changes their capacity to influence liquidity and lending conditions.
Third, stablecoins introduce dependencies on foreign issuers, reserve custodians and banking partners. Domestic regulators may supervise local payment providers without having direct oversight of the institutions holding the underlying reserves.
In a period of financial stress, the ability to redeem stablecoins depends on those institutions and their access to dollar liquidity. African central banks cannot create the foreign currency required to meet those obligations. Finally, regulatory frameworks need to account for these cross-border dependencies.
Supervising domestic intermediaries is insufficient without understanding reserve structures, redemption arrangements, concentration risks and the legal rights of stablecoin holders. Cooperation with foreign regulators will become increasingly relevant as adoption grows.
Stablecoins offer opportunities to improve payments, facilitate trade and expand access to international financial services.
However, their growing adoption also has implications for the distribution of savings, the funding of domestic banks and the effectiveness of monetary policy.
For African central banks, the priority should be to understand where financial risk and liquidity are being reallocated, and whether the efficiency gains from stablecoins come at the expense of greater dependence on foreign monetary systems. The question is not simply how to regulate a new payment instrument, but how its adoption could reshape the structure of African financial markets.