A tripling call for bitcoin ETFs rests on allocators, not wrappers

U.S. spot bitcoin exchange-traded funds took in $38 billion of net new money in their first year, more than double the $10 billion to $15 billion that Bloomberg Intelligence's Eric Balchunas and his colleagues had projected, and the inflow line kept climbing: by the time of his interview with CoinShares it sat at about $40 billion. Bitcoin's price did the rest, carrying total assets to nearly $120 billion, just shy of the gold ETF complex — a base that took gold funds well over a decade to match, by Balchunas's accounting.

That last comparison is the one the asset class will run in its marketing, and it is the least informative number in the set. ETF assets rise on price alone, which is why Balchunas calls net inflows the hardest figure for any fund to grow; the $120 billion is a blend of new money and a bitcoin mark-up, while the $40 billion is the part that represents a decision someone made. When the two lines diverge, only one of them is telling you about adoption, and a tripling achieved through price would say nothing about the institutional allocation Balchunas is betting on.

Balchunas said bitcoin ETFs could triple the size of gold ETFs within three to five years — larger than the current base — resting that call on institutions that manage far more money than the entire crypto market has so far allocated toward it.

The arithmetic is his own: global institutions hold roughly $100 trillion, so a 1% allocation would mean $1 trillion of new demand chasing a supply fixed at 21 million coins. That sizes the pool. Reading it as a trajectory is the mistake the case invites, because what has to happen between here and a tripled asset base is an allocation decision by committees that have not made one, and nothing about the wrapper settles how that vote goes.

What the wrapper does settle is the cost of holding the exposure: crypto exchanges and self-custody wallets carry steep fees and clunky transfers, while the ETF trades through a brokerage account with a spread of about one basis point and an annual fee of 20 to 25 basis points. Run that fee against the current asset base and the complex is worth roughly $240 million to $300 million a year to its issuers before anyone talks about tripling anything — a fee line most issuers would take seriously, and a large part of the explanation for who showed up to file: BlackRock filed in June 2023, a moment Balchunas calls a turning point for the asset class, with Fidelity Investments, Invesco and Ark Investment Management following soon after, and the Securities and Exchange Commission approved the funds in January 2024.

That roster is the tell: the applications came from sponsors built to run conventional ETF lineups, not from a crypto-native set, which suggests the trade was understood from the first filing as a distribution business with a crypto underlying attached.

The other route into bitcoin — a treasury company such as Strategy Inc., formerly MicroStrategy — draws a flatter assessment. Balchunas said most investors prefer the direct spot exposure an ETF provides, comparing it to the way SPDR Gold Shares tracks gold and noting that a treasury company layers on leverage and balance-sheet risk the fund avoids; for an institution, those two vehicles answer different questions: one holds the asset, the other holds the asset plus a corporate capital-structure decision, and the leverage in the second would show up first if the underlying fell.

Crypto-adjacent wrappers have a habit of drifting: WGMI's 80% policy running from bitcoin miners toward AI power is one recent example, and older crypto funds have rewritten their holdings more than once. The spot bitcoin funds are the part of that shelf whose mandate is fixed by the asset underneath — no index committee, no thematic reweight, nothing to argue about except the price. For the allocators Balchunas is waiting on, that matters more than the trading spread does, because a spot bitcoin fund can sit inside a policy statement that a miner fund would not survive.

The interview itself ran on CoinShares' crypto ETF hub, and CoinShares is the issuer behind the CoinShares Bitcoin ETF (BRRR), a fund that benefits if the projection lands — a projection delivered through an issuer's own content channel should be read as a claim from an interested venue. The numbers underneath are checkable either way, and they are the reason the shelf argument holds only in part here: product is being listed faster than the desks behind it can price and distribute the flow, and the next clearing event will be a reset of the shelf, not a slowdown in launches. The bitcoin complex is the counterexample the thesis has to absorb — it cleared a regulatory gate that opened only in January 2024 and pulled $40 billion through, which suggests a launch is constrained most by whether a buyer exists at the other end. Where the shelf argument still bites is in products that arrive without one.

Skeptics get one concession from Balchunas: an alternative to the dollar now exists, he said, and that alone may push governments to keep currency debasement and money printing in check. That argument does not need bitcoin to triple gold's asset base to be right, but it also will not produce the flows. Only the flow line can make that case, and the cleanest test of whether the tripling call describes behavior or arithmetic is a stretch of flat bitcoin prices with the inflow figure still running.