I spent part of this week with the BIS’s new chapter on stablecoins, all forty five pages of it, because I wanted the numbers rather than the narrative. What stuck was not the headline figure, though it is worth having in hand: stablecoin market value sat around 320 billion dollars as of the end of May, according to the BIS’s own count. What stuck was a word the paper keeps returning to. Singleness.
Singleness is central bank language for a simple idea. A dollar should be a dollar no matter who is holding it or where. A deposit at a small regional bank, a deposit at a money center bank, a hundred dollar bill, a wire in transit, all of it is supposed to be redeemable at par, no questions asked, because a two tier system of central bank money and supervised intermediaries stands behind every claim. The BIS’s actual argument is that stablecoins have not earned that property yet. Redemption is uneven. Secondary market prices drift off the peg more than banking regulators would tolerate from an actual bank. I am less interested in whether the BIS is right about the grading than in the frame itself, because the frame answers a question traders keep getting wrong: what, exactly, is backing the token you are holding.
Almost all of it is one thing. 99.4 percent of dollar pegged stablecoins, by the BIS’s count, are pegged to the dollar specifically, which sounds circular until you remember how much regulatory energy in Europe and Asia has gone into building compliant alternatives that the market has mostly ignored. Trace the cash and it keeps ending up in the same place: short dated government bills, bank deposits, reverse repos, the ordinary furniture of dollar funding markets. The BIS notes that issuer holdings of Treasury bills have grown large enough to rival those of major sovereign holders and government money market funds. A token that feels native to crypto is, underneath, one of the more conventional holders of American government debt.
That split, token onchain and reserve offchain, is not a bug somebody forgot to fix. It is the whole design. A blockchain can prove a transfer happened between two addresses. It cannot prove a bank deposit is still there, that a custodian will perform, or that a Treasury position can be sold at par during a stressed week. Those are legal and institutional questions, and no amount of block confirmation settles them.
Here is the part that should bother people more than it does. Self custody does not touch this. If you move your stablecoin off an exchange and into your own wallet, you have removed one real risk, the risk that the exchange itself becomes insolvent and your balance gets frozen in a bankruptcy proceeding. That is not nothing. But the wallet secures your control of the token. It does not secure the issuer’s bank deposits, and it does not change the legal chain connecting you, the issuer, and whatever sits in the reserve account. It is a common mistake to treat not being on an exchange as functionally the same as having no counterparty. It is not the same claim at all.
Where this gets interesting, rather than just cautionary, is the direction the dependency runs. A user in a country with a wobbly currency does not need a US bank account, a US brokerage, or even a smartphone banking app to get exposure to the dollar. They need a wallet and an internet connection. From that user’s seat, crypto infrastructure has genuinely reduced how much they depend on domestic banking. Look at the same fact from the dollar’s side and something close to the opposite is happening. Its reach has grown. A public blockchain becomes one more rail carrying dollar demand into places the correspondent banking system was slow or unwilling to serve. The BIS has a phrase for the downside version of this, stablecoin dollarisation, and flags the risk that in emerging markets it could erode monetary sovereignty the way old fashioned deposit dollarisation did. I have not dug into how solid the cross border flow data actually is here. Even the BIS admits its own numbers on this are thinner than the deposit dollarisation data they are compared against, and I am inclined to take the comparison as suggestive rather than settled.
So crypto versus banks is the wrong frame, and has been for a while. The better question is which functions move onto a blockchain and which stay put. Transfer, programmability, self custody, twenty four hour settlement: those migrate cleanly. The unit of account, the government debt sitting in reserve, the bank relationships that let an issuer hold cash at all: those do not migrate, they just get a token layered on top.
There is a version of this piece that lists every layer in the stack, the monetary layer, the reserve layer, the institutional layer, the blockchain layer, the custody layer. I drafted that version and cut most of it, because a taxonomy is not an argument. The one layer worth keeping in your head is the reserve layer, because it is the layer that fails quietly. A blockchain can keep producing blocks while confidence in a stablecoin evaporates. A wallet can stay perfectly secure while the DeFi protocol using the token underneath it does not.
Here is where I would be wrong. The BIS’s own preferred fix is a unified ledger built on tokenised central bank reserves, which would let a dollar stablecoin settle directly against central bank money instead of routing through commercial bank deposits and Treasury bills the way issuers do now. Project Agorá is the early prototype, eight central banks and forty plus institutions testing exactly this. If that architecture actually gets built and a major dollar stablecoin issuer moves its reserves onto it, the dependency I am describing here gets a lot thinner, because the offchain leg would run straight to a central bank instead of through the ordinary banking system. I do not think that happens on any timeline that matters for a trader positioning this year. But it is the one development that would make this piece wrong rather than just early.
Until then, the infrastructure works precisely because it hides this. Nobody thinks about the correspondent banking relationships behind a card swipe either. The better stablecoins get at feeling like dollars, the easier it becomes to forget that a dollar sitting in a wallet is still, underneath, a claim on a balance sheet somewhere, run by people you have never met, subject to rules you did not write.
Anyway. The token moved instantly. The dollars behind it are still exactly where they always were.
Your Stablecoin Is Onchain. The Dollars Behind It Never Left the Bank. was originally published in The Capital on Medium, where people are continuing the conversation by highlighting and responding to this story.
