The stablecoin market has grown large enough to rival the foreign-exchange reserves of many countries. According to CoinDesk, the combined market value of stablecoins is now around $320 billion and exceeds the FX reserves of 95 nations, including the UK, Canada, Poland, Thailand, Mexico and the UAE. The comparison needs context: stablecoins are not the same as sovereign reserves. They are privately issued digital tokens, while FX reserves are official central bank assets used to defend currencies and absorb external shocks.

Still, the scale matters. Stablecoins have become a major channel for dollar liquidity on blockchain rails, used in crypto trading, DeFi and increasingly in cross-border payments where traditional banking is slow or expensive.

That growth is also drawing regulatory concern. BIS research warns that dollar-backed stablecoins may accelerate digital dollarisation, weaken capital controls and add pressure on currencies in emerging markets. The risks are most visible in economies with high inflation, current-account stress or weak confidence in local money. The main takeaway is that stablecoins are no longer just a crypto trading tool. They are becoming part of global capital infrastructure — useful, fast and increasingly systemic, but also harder for governments to control.