The Second-Biggest Tokenized Treasury Fund Lives on Binance's Chain, Not Ethereum

Revised October 2, 2026: figures corrected.

Tokenized real-world assets are widely assumed to live on Ethereum, which has long held the largest share of them. The second-largest tokenized Treasury fund is an exception. USYC — the US$2.6 billion onchain Treasury fund Circle issues after its acquisition of Hashnote — keeps 98% of its supply on BNB Chain, and 2% on Ethereum.

The distribution follows use, not blockchain prestige. USYC sits on BNB Chain because that is where the token is used. Circle supports USYC as off-exchange collateral for Binance's institutional clients — a yield-bearing Treasury token traders can post against their positions, held in triparty custody — and its supply gathered where that demand exists. A fund built to margin trades on the largest exchange settles on that exchange's chain.

A chain choice that follows function

A tokenized asset's chain is usually read as a wager: the issuer picks Ethereum, or Solana, or a newer chain, betting on where the ecosystem will grow. USYC inverts that reading. Its home chain is not a bet on BNB Chain's future; it is a consequence of the fund's function. USYC represents shares in a short-duration US Treasury fund, and Circle supports it as off-exchange collateral for Binance's institutional clients, held in triparty custody. The demand for USYC is demand to earn Treasury yield on capital that would otherwise sit idle as trading margin, and that demand exists on the exchange. The chain distribution records what the token is for.

The whole fund on BNB Chain is a single wallet

The concentration is more literal than a chain split conveys. On BNB Chain, the entire US$2.6 billion of USYC is held by one address — not the largest holder among many, but the sole holder of consequence, with essentially 100% of the chain's supply. On Ethereum, the smaller balance is spread across roughly two dozen wallets. A single-holder structure is the onchain form of an off-exchange-collateral arrangement: the fund is pooled into one custody position and posted against trades, rather than distributed to independent holders. USYC's home chain is therefore a fact about where the fund is custodied, not about where a base of users has formed.

Ethereum has shrunk fastest over the past two months. Since early July, USYC's Ethereum supply has fallen by roughly half — from about 72 million tokens to about 37 million — while BNB Chain supply fell about 15%, from 2.64 billion to 2.25 billion tokens. The fund is not spreading across chains; its Ethereum balance is contracting faster than the BNB position, and its BNB Chain share has risen from about 97% to 98% as a result.

Why it matters

Three implications follow. First, the “RWA lives on Ethereum” consensus is less settled than the aggregate share suggests: one of the two largest tokenized Treasury funds sits almost entirely elsewhere, and it arrived there through use rather than incumbency. Second, the case points to how tokenized Treasuries grow — not chiefly as neutral DeFi collateral on the default chain, but as exchange-integrated instruments that settle where their trading demand clears. USYC and BUIDL exchange the top rank of the tokenized-Treasury table from month to month; USYC holds its position as a single collateral block on a chain the institutional narrative rarely names. The same pattern governs how the onchain dollar splits across chains .

Third, the concentration is structural rather than incidental: nearly the entire US$2.6 billion fund sits on a single chain, in a single wallet. The arrangement is efficient, because the token resides where it is used, and it ties the fund's onchain existence to one network and one custody relationship. That coupling matters beyond USYC. A tokenized Treasury marketed as neutral, chain-agnostic collateral behaves, in this case, as an extension of a single exchange's balance sheet — its redemption path, its counterparty risk, and its continuity run through Binance's custody and BNB Chain rather than across a diversified base of holders. For an allocator, the relevant exposure is not “a tokenized Treasury fund” in the abstract but a position whose fate is bound to one venue.

Played forward, this reframes where the growth of tokenized Treasuries will accrue and who will capture it. If the category expands primarily as exchange collateral rather than as open DeFi infrastructure, its scale will concentrate on the venues that can originate that demand — large exchanges and their custody stacks — and the chains those venues operate. The measure of the tokenized-Treasury market then becomes less “how much Treasury value is onchain” and more “how much of it is captive to a handful of trading platforms.” USYC is the clearest instance so far: a top-two fund whose BNB supply sits in one wallet, consistent with a single collateral position. Whether the rest of the category follows it onto a few anchor venues, or diversifies across chains and holders as tokenized Treasuries find uses beyond the trading desk, will determine whether onchain Treasuries mature into shared market infrastructure or into the private settlement layer of the exchanges that host them.