Stablecoin payments move from crypto markets into banking rails

Stablecoins are officially breaching the walls of traditional finance, transitioning from volatile crypto trading pairs into legitimate corporate settlement assets.

While speculative crypto trading initially fueled their rise, a new pilot in Colombia by Circle and ACI Worldwide signals a shift toward real-world banking integration.

Rather than seeking to tear down and replace legacy systems, digital dollars are now being engineered to run directly alongside established treasury, governance, and institutional workflows.

As financial institutions closely watch this structural integration, a fierce battle for dominance is unfolding among the top digital assets.

USD Coin (CRYPTO:USDC)

USDC is the central asset in the Colombia pilot between Circle Internet Group (NYSE:CRCL) and ACI Worldwide (NASDAQ:ACIW), which aims to test stablecoin settlement through existing banking workflows.

The dollar-pegged token has a market capitalisation of approximately US$71.28 billion, making it the second-largest stablecoin by circulating value in DefiLlama’s figures.

The pilot focuses on how financial institutions can incorporate USDC settlement without replacing established payment systems, although the announcement does not establish a public launch date.

Tether (CRYPTO:USDT)

Tether is the closest scale comparison to USDC, with a market capitalisation roughly 2.55 times larger in the same dataset.

Both tokens target a value of US$1 and support digital-dollar transfers, but the announced Colombia pilot specifically uses Circle’s USDC infrastructure.

USDT’s larger supply highlights the existing scale of dollar stablecoins, although market capitalisation alone does not establish adoption by banks or use in payment settlement.

PayPal USD (CRYPTO:PYUSD)

PayPal USD is another dollar-pegged token connected to a traditional payments company, making it relevant to the push to integrate stablecoins into established financial services.

Its market capitalisation was approximately US$3 billion, substantially below USDC’s US$71.28 billion, illustrating the difference in circulating supply between the two tokens.

PYUSD provides a useful comparison for evaluating how established payment brands bring digital dollars into their ecosystems, although its market capitalisation does not measure bank settlement activity.

Ripple USD (CRYPTO:RLUSD)

Ripple USD is a dollar-pegged stablecoin that offers another comparison for institutions considering digital assets for payments and settlement.

DefiLlama placed its market capitalisation at approximately US$2.60 billion, far below USDC’s supply but close to PYUSD’s scale.

Its relevance lies in the broader competition to connect stablecoins with payment services, while the Circle–ACI announcement provides no evidence that RLUSD participates in the Colombian pilot.

Global Dollar (CRYPTO:USDG)

Global Dollar is another dollar-pegged stablecoin competing in the market for digital-dollar circulation and payment use.

Its market capitalisation stood at approximately US$3.06 billion, putting it close to PYUSD and ahead of RLUSD in the same snapshot.

USDG provides a further comparison for the sector, but the available announcement does not identify it as part of ACI Worldwide’s Colombian settlement initiative.

The bottom line

The Circle–ACI initiative reflects a broader effort to move stablecoins beyond crypto trading and into existing financial operations, beginning with a pilot in Colombia.

USDT leads the selected group by market capitalisation, while USDC is the asset directly involved in this pilot; neither circulating supply nor market size alone proves payment adoption.

The next meaningful milestone will be evidence of operational implementation, including participating institutions and live settlement activity, rather than the announcement of another partnership.