Eric Balchunas, senior ETF analyst at Bloomberg, expects spot Bitcoin (BTC) ETFs to eventually grow to three times the size of the gold ETF market — a scenario that would lift Bitcoin fund assets under management to between $300 billion and $400 billion.

Balchunas first outlined the forecast in a recent interview. When an X user pushed back on whether tripling gold was too aggressive a benchmark, he doubled down on Friday. “BTC ETFs assets triple gold ETFs assets. That would mean BTC AUM hits $300-400b. Totally realistic long term imo,” he wrote in the reply.

The projection is framed as a long-term trajectory rather than a near-term target. If realized, the Bitcoin fund complex would rank among the largest commodity-linked ETF categories in existence.

Three Forces Behind the Thesis

Three forces underpin the call. The first is demographic: Bitcoin's investor base is far younger than gold's, and Balchunas argues that as younger generations accumulate wealth, they will default to the asset they grew up with as their store of value. “I think as the younger investors get more money and grow up with Bitcoin as their quote-unquote store of value, I do believe the Bitcoin ETFs will triple gold in assets,” he said.

The second is institutional adoption. He expects major financial institutions to lean harder on the asset in portfolios if its volatility continues to decline and its correlation with technology stocks weakens.

The third is raw momentum — in his words, there is “way more enthusiasm and sales firepower” behind Bitcoin than gold products have ever commanded. The thesis effectively assumes that generations raised on HODL culture will come to control the bulk of investable wealth: a transfer of conviction, not merely of capital.

Gold's 5,000-Year Head Start

Balchunas is equally candid about why gold still owns the institutional room today. “Bitcoin is like gold as a teenager,” he said — gold is roughly 5,000 years old and “was mentioned 450 times in the Bible,” while Bitcoin is a 17-year-old asset.

For conservative capital, that gap in history is not cosmetic. Gold's price swings are substantially milder, and millennia of monetary track record anchor its credibility with pension funds, insurers and sovereign desks. It is a credibility race measured in centuries, and Bitcoin is new to it.

Volatility is also the objection Balchunas encounters most often. In surveys run by ETF issuers, institutional investors consistently cite price swings as their chief reservation about Bitcoin. He framed the asset's current stage of development as adolescence — technically functional, but still proving itself to risk-averse allocators. That framing matters because it isolates the exact variable institutions are pricing: not Bitcoin's design or its custody rails, but its day-to-day behavior.

Balchunas treats the hesitation as time-limited. If volatility keeps compressing and market structure matures, he anticipates an “inflection moment” at which large institutions begin treating Bitcoin as a dependable store of value or a portfolio diversifier.

Wider Access and Technical Defense

The access layer is already widening in parallel: EU banks are broadening Bitcoin access as the MiCA registry doubled to 80 entities. Issuers themselves are investing in the asset's durability, with VanEck's Sigel pointing to BIP-360 as a quantum-risk defense.

Adoption as the Barometer

The weight of the call sits less in the $300-400 billion figure than in the condition attached to it in Balchunas's own X post — the primary record of the forecast: adoption, not price. Institutional participation is already compounding through treasury-style structures such as the strategic Bitcoin reserve model. Whether the tripling materializes will therefore be read as a referendum on market maturity rather than on marketing.

Live market data offered a reminder of the challenge ahead: Bitcoin spot moved 6.0% over the past 24 hours, evidence that the very variable Balchunas flags as the gate — volatility — front and center.