Spot Bitcoin ETFs solved access, but custody, advisors and plumbing still lag, panelists say

Senior figures from CoinShares, Calamos, ProShares and Flow Traders flagged Coinbase-heavy custody concentration, modest advisor uptake and creation-flow inefficiency as being among the next set of problems to solve.

What to know:

• Spot Bitcoin ETFs solved crypto’s long-running access problem by putting bitcoin exposure inside a familiar brokerage and wealth-management wrapper.
• Advisor adoption remains modest relative to the size of the wealth-management market, with client-communication risk still limiting broader allocations.
• Custody concentration and inefficient creation flows remain key structural issues as bitcoin ETFs mature beyond their launch phase.

Spot bitcoin ETFs cleared crypto's long-standing access hurdle by placing bitcoin inside brokerage and advisor accounts already used for stocks and bonds. Two and a half years in, panelists at CoinDesk's Consensus Miami conference agreed that part had worked. However, they said custody concentration, modest advisor uptake and back-office plumbing all remain unresolved.

Christopher Russell, head of strategic planning and analysis at Calamos Investments, framed the access win in numbers. "The ETF solved one big problem, which was access," he said. The roughly dozen US spot bitcoin ETFs now hold around $107 billion in combined assets, with about $20 billion in institutional hedge funds, $12.5 billion allocated by registered investment advisors, and 60% sitting in direct retail accounts.

Out of $146 trillion in advisor-managed AUM, that $12.5 billion advisor allocation "seems like a big number, but it's a really small number," Russell said. He pointed to what he called the 1% problem: "They can take a 1% position in a 50-60 vol asset, but they don't want to spend 50% of their client meetings explaining why a 1% position went down 50%."

Jean-Marie Mognetti, CEO and co-founder of CoinShares, pressed on the structural side. "Right now they are all using one custodian, which is Coinbase, creating a massive concentration risk in the market," he said. "From a protection and diversification point of view, it's a zero. If you were in any hedge fund, you would want to get a number of prime brokers to diversify your risk."

Mognetti’s warning lands in a market that is no longer uniformly single-custodian, but where Coinbase remains a central piece of ETF infrastructure. Fidelity’s FBTC uses Fidelity Digital Assets, VanEck’s HODL launched with Gemini and later added Coinbase, BlackRock’s IBIT added Anchorage Digital Bank alongside Coinbase, and Morgan Stanley’s proposed bitcoin ETF names Coinbase Custody and BNY as bitcoin custodians.

Aaron Dimitri, general counsel for digital assets at Flow Traders, said ETFs have shifted bitcoin from pure buy-and-hold exposure into broader portfolio construction. “You’re not just buying and holding an asset, hoping it appreciates over time,” he said. “You’re able to build in yield products, different structured vehicles.” For institutions, Dimitri said, ETFs do not remove bitcoin’s volatility, but they make the exposure easier to package and manage. “If you’re going to go on a roller coaster, you might as well make sure that the lap belt locks down before the ride takes off,” he said.

Simeon Hyman, global investment strategist at ProShares, pushed back on treating volatility as a problem to be engineered away. "Volatility is a feature, not a bug," he said, citing bitcoin and ether both up 20% since the start of the war in Iran. If an asset is volatile but not closely correlated with stocks and bonds, "you sprinkle a little in and you're going to improve Sharpe ratio efficiency," Hyman said. "But you got to be ready to tell the story." He also argued that futures-based products retain a role: ProShares' BITO, launched in October 2021, holds about $2 billion in assets but still trades at 35% of the daily volume of BlackRock's IBIT, the dominant spot product.

The discussion lands against an unsettled demand backdrop. Strategy, the largest corporate Bitcoin holder with 818,334 BTC, reported a roughly $12.5 billion Q1 net loss this week. CoinDesk reported that the company signaled it could sell some bitcoin to help meet dividend obligations. Strategy’s accumulation has been widely viewed as one of the structural demand pillars of the post-ETF era.

Asked for a five-year price target, Russell predicted Bitcoin reaches $1 million within five years, "but it's not going to be a straight line."

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