Stablecoins Now Move $10 Trillion a Month. The Pile Hasn't Grown in a Year.

On Wednesday, Standard Chartered's head of digital assets research, Geoffrey Kendrick, quietly moved one of crypto's most quoted numbers. The bank still thinks stablecoins will reach $2 trillion in supply, but it now expects to get there by 2030 instead of 2028. The reason is blunt: supply has been stuck between $300 billion and $320 billion for a full year and sits around $309 billion today.

Here is the part that should have led the headlines. In the same report, Kendrick noted that monthly onchain transfer volume has averaged just under $10 trillion this year, up from $4 trillion in 2025, with a record $19 trillion in May. The average stablecoin dollar now changes hands about 30 times a month, double last year's pace. USDC's velocity has climbed to roughly 80 times a month.

Same dollars. Twice the trips.

That is not a stalled market. It is a market that has figured out what stablecoins are for, and the answer is not the one the $2 trillion forecast was built on. The money is moving faster because almost nobody has a reason to let it sit still, and the rules arriving in January will keep it that way.

The $2 trillion forecast is a bet on balances, and the market is building pipes.

Forecasts like Standard Chartered's measure the stock of stablecoins outstanding, because that stock is what earns issuers their living. Tether and Circle hold reserves in Treasury bills and keep the interest. Every dollar parked in USDT or USDC is a dollar of float. Every dollar that only passes through on its way to a bank account is, for the issuer, a rounding error.

Usage tells you which of those two worlds is winning. Stablecoin Insider's Q3 report put total supply at $304.2 billion on September 29, about $16 billion below May's peak of $320.6 billion, and recorded a $7.7 billion drop in June that was the largest monthly decline since Terra collapsed in May 2022. Over the same stretch, adjusted transaction volume hit a monthly record of $1.79 trillion in June, up 125% year over year.

Supply down, throughput up. That split is the whole story.

USDT and USDC have quietly turned into two different products.

Kendrick's own numbers make the point better than any commentary. USDT's velocity has stayed near seven times a month, while USDC's has gone from 45 to about 80. He attributes the gap to use: USDT is mostly a dollar savings account for people in emerging markets, and USDC is used for payments, trading and, increasingly, machine-to-machine transfers between AI agents.

Look at the market shares and the divergence gets sharper. USDT holds about 60% of supply and USDC about 25%, according to Stablecoin Insider, yet USDC carried roughly 70% of adjusted transaction volume in the first half of the year, against about 25% for USDT. The token with the smaller pile is doing most of the work.

The payments data from Allium's September report fills in who is using the pipe. Identifiable payments ran between $401 billion and $527 billion in the first eight months of 2026, up 42% to 63%, and businesses received most of it. Business-to-business settlement was the largest lane at up to $153 billion, followed by service fees and $43 billion of payroll. Retail purchases were just $19 billion. Agent payments over the x402 standard hit 29 million transfers in August, averaging about six cents each.

None of that requires anyone to hold a large balance. A company paying a supplier in Mexico needs dollars onchain for minutes, not months. An AI agent buying a data query for six cents needs a wallet with lunch money in it. Payment rails reward speed, and speed is the opposite of float.

Washington has written idle stablecoins out of the business model.

If holders had a reason to sit on stablecoins, they would. The law is removing the main one.

The GENIUS Act bars issuers from paying holders interest or yield, and the regulators now writing its rules are stretching that ban outward. The Federal Reserve's proposal, issued September 24, would prohibit paying interest or yield to holders "solely for holding, using, or retaining the stablecoin," and adds a rebuttable presumption that catches affiliate and white-label arrangements designed to get around it. The OCC and FDIC proposals take the same approach. The Fed's two proposals were published in the Federal Register on September 29, with comments due November 30.

Then there is safety. The FDIC has proposed that reserves held as bank deposits be treated as the issuer's deposits, insured up to $250,000 for the issuer, and not on a pass-through basis to each holder. So a stablecoin balance pays nothing by law and carries no deposit insurance, while a money market fund or a high-yield savings account offers either a return or a federal backstop. A rational treasurer holds the stablecoin for exactly as long as the transfer takes.

The rules do leave one gap, and it explains where much of the remaining pile sits. Stablecoin Insider notes that the ban covers issuers but not affiliates, so exchange rewards funded by reserve revenue-sharing have continued and the fight has moved to the OCC. Allium counts $89 billion of stablecoins sitting on exchanges and $26 billion in DeFi. Trading still accounts for 69% of adjusted volume. Take away the exchange reward programs and the idle balance shrinks further.

Concede the cyclical case. It still doesn't get you to $2 trillion.

Kendrick's argument deserves a fair hearing. He calls the slowdown "cyclical rather than structural" and points out that earlier flat or falling stretches in supply were followed by renewed growth once crypto markets recovered. That has been true. Stablecoins have historically grown when traders needed collateral, and traders need collateral in bull markets. With crypto prices sliding this week after a hot US inflation print, the cycle is not exactly helping.

But the earlier rebounds came from the same place the old supply came from: exchange balances and leverage. This year broke that link. Usage more than doubled while supply went nowhere, which is what you would expect if new demand is coming from payments rather than from traders. A bull market can refill exchange wallets. It cannot make a payroll provider hold a month of wages in a token that pays nothing and isn't insured.

The rest of the institutional pipeline is running into the same wall. Morgan Stanley's head of digital asset strategy, Amy Oldenburg, told The Block on Monday that the bank now expects to support tokenized equities on its trading system in the first quarter of 2027, not the second half of 2026, adding that "the client demand really isn't there because the product doesn't exist." Twenty-one banks, including Bank of America, Citi and Goldman Sachs, have announced a joint dollar stablecoin targeting the first half of 2027, but the company formation is still pending. The supply that would push the total toward $2 trillion is mostly promised, not minted.

The fight is over who earns the float, and it is getting smaller.

Kendrick's own report points to where this goes next. He expects the most contested market to be payments in developed economies, which he calls the TradFi replacement sector, and names challengers such as Open USD, the M^0 infrastructure platform and a planned bank network called A+ that would let banks issue a shared stablecoin and keep the reserve income. He says yield capture will decide who wins.

That is the right frame, with an uncomfortable corollary. When velocity doubles and supply stays flat, the pool of reserve income being fought over stays flat too, while the number of issuers competing for it multiplies. Issuers who built their business on float will need fees, services or distribution deals to make up the difference. Users, meanwhile, get faster and cheaper dollars. That is a good outcome for payments and a poor one for anyone extrapolating issuer revenue from a $2 trillion supply line.

Treasury's comment period on its GENIUS issuance rules closes October 19, and the Act takes effect by January 18, 2027. Watch the velocity number, not the supply number. If it keeps climbing while the pile stays put, stablecoins will have won the payments argument and quietly lost the savings one, and the $2 trillion date will keep sliding.