Here's a number that sounds bad until you look closer: stablecoin market cap dropped $13.9 billion from its May peak, the steepest monthly contraction since Terra collapsed in 2022. USDT fell from $189.5 billion to roughly $184 billion. USDC dropped from $77.3 billion to $72.4 billion.
Here's the number that explains why it isn't actually bad: adjusted stablecoin transaction volume hit $1.83 trillion in June, a record, up 60% from May and more than double what it was a year ago.
Put those two facts together and the story isn't "stablecoins are shrinking." It's "stablecoins are being used for what they're supposed to be used for." Money that used to sit idle in a wallet is now moving, paying people, settling trades, crossing borders, at a pace that's roughly doubled in two years. Standard Chartered puts current turnover at about six times a month per dollar, well above a typical dollar sitting in a US bank account.
Some of the departed supply went somewhere specific: tokenized Treasury products, which can pay yield in a way regular stablecoins legally can't since the GENIUS Act came into force in mid-2025. That market has grown from about $11 billion in March to over $16 billion now. Treasurers park the yield-bearing version and only hold plain stablecoins when they need to actually spend or send money, which is a healthier pattern than parking idle cash in either.
USDC is doing more of the heavy lifting on settlement than its supply size would suggest, processing $1.21 trillion in adjusted volume in June against $576 billion for USDT, despite USDT's much larger overall float.
Not all of that volume is a real-world payment, plenty is exchange transfers and automated trading. But real payments are growing too: McKinsey and Artemis data put identifiable global stablecoin payments at roughly $390 billion in 2025, split between business-to-business transfers ($226 billion) and payroll plus remittances (about $90 billion).
This is the shift worth watching. Market cap made headlines because it's how issuers earn interest on reserves. But for anyone actually building on this infrastructure, including apps like bonuz that move value onchain for real users, transaction frequency and payment volume are the numbers that show whether stablecoins are becoming genuine financial plumbing or just a trading instrument. June's data leans hard toward the former.
