The Custody Problem for Tokenized Assets: $11 Trillion in RWAs Concentrated in Five Institutions

Real-world asset tokenization is scaling fast, but custodial concentration is recreating the exact systemic risk blockchain was designed to eliminate.

We previously explored how tokenization is quietly rebuilding capital markets. BlackRock’s $2.5 billion tokenized Treasury fund. Siemens issuing corporate bonds on public blockchains. Real estate platforms enabling fractional ownership of commercial properties.

It appears that tokenized assets are gaining momentum, and that the infrastructure works, as real capital is flowing through blockchain rails, with projections suggesting trillions more following.

But there’s a detail in these real-world asset (RWA) tokenization success stories that deserves closer examination.

If you invest in BlackRock’s BUIDL fund, you do not hold the tokens directly. A custodian holds them for you, such as Fireblocks, Anchorage Digital, BitGo, Copper.

Your ownership gets recorded on an immutable public ledger, but access to that ownership sits behind the same institutional gatekeepers that have always controlled traditional finance.

Some will argue this makes sense. Institutional investors need regulated custodians, compliance requires clear accountability, current insurance only covers custodial arrangements, while Fiduciary duty demands professional asset management.

However, could it be true that these requirements stem from actual necessity or, do they exists just because the old infrastructure didn't offer better options.

Traditional finance needed custodians because there was no other way to verify ownership and prevent fraud. Custodians existed because the alternative was chaos.

We can argue that blockchain has removed that fundamental constraint. Ownership can be verified, assets can be transferred and transactions can be settled, all without any middleman.

The technology proves who owns what without requiring trust in a third party. Billions in value move across public blockchains daily with no custodian involvement.

Yet as tokenization scales from experimental pilots to institutional adoption, we are choosing to preserve the custodian model anyway. The reasoning goes like this: blockchain technology might work fine for crypto-native assets, but tokenized real-world assets require institutional safeguards. Tokenized Treasuries, corporate bonds and real estate carry too much value to trust to some software wallet. Better to let professionals handle custody while you enjoy the benefits of blockchain settlement.

That logic starts breaking down when you consider the scale.

How Custodial Concentration Creates Systemic Risk in Tokenized Markets

Global financial assets total around $225 trillion. Right now, tokenized real-world assets represent roughly $10–15 billion.

If even 5% of global financial markets move on-chain over the next decade, that represents $11 trillion in tokenized assets. BCG forecasts $16 trillion. Analysts tracking real estate tokenization alone suggest $3 trillion by 2030.

These are Treasuries backed by governments, corporate bonds issued by Siemens and J.P. Morgan, real estate generating rental income. Real assets with real cash flows, now represented as tokens on public blockchains.

So here’s the custody problem. How many custodians will hold those $11 trillion in tokenized assets?

Right now, institutional custody in crypto markets concentrates around five major players: Coinbase Custody, Fireblocks, Anchorage Digital, BitGo and Copper. Franklin Templeton’s FOBXX fund uses the same custodians as BlackRock’s BUIDL. Real estate tokenization platforms route through the same infrastructure.

If that concentration continues as RWA tokenization scales, you end up with roughly $2 trillion per custodian on average. More realistically, the top two or three custodians will hold the majority. You might see $4–5 trillion concentrated in Coinbase Custody or Fireblocks.

What happens if one of those custodians gets hacked, goes bankrupt, faces regulatory action that freezes assets, or suffers operational failure that locks withdrawals?

Lehman Brothers collapsed in 2008, and the resulting cascade nearly broke the global financial system. The problem was not just that Lehman failed. The problem was interconnection. When one node failed, the connections propagated the failure everywhere.

Custodial concentration in tokenized markets creates similar interconnection risk. If Fireblocks holds $4 trillion in tokenized assets and experiences a critical failure, every fund, institution and platform using Fireblocks gets hit simultaneously. BlackRock’s Treasury fund freezes. Franklin Templeton’s money market fund locks. Real estate platforms halt withdrawals. Settlement stops.

You might argue that custodians have insurance, redundancy and regulatory oversight that make catastrophic failure unlikely. Maybe. But unlikely events become systemically important when you concentrate trillions in a few institutions.

Regulatory Control Points in Tokenized Asset Infrastructure

The deeper issue is not just operational risk. Custody concentration also creates regulatory capture points. Governments seeking to control tokenized asset flows do not need to regulate protocols or blockchains. They regulate the custodians. If five institutions control access to $11 trillion in tokenized assets, those five become choke points where regulation gets enforced. Freeze orders, seizure demands and compliance requirements all flow through custodians, which means blockchain’s permissionless nature becomes irrelevant for anyone using custodial services.

This matters more as real-world assets tokenize, not less. When tokenization was mostly about cryptocurrency, the custody question felt abstract. When tokenization involves Treasuries, corporate bonds and real estate that underpin retirement accounts and institutional portfolios, concentration risk in custody becomes concentration risk in the actual economy.

Why Institutional Finance Defaults to Centralized Custody Models

Part of the answer is path dependence. Institutional finance operates through custodians because it always has. Moving assets on-chain does not automatically change organizational assumptions about how custody should work. Compliance teams, risk managers and legal departments default to familiar models even when new infrastructure makes those models optional rather than necessary.

The other part of the answer lies in genuine concern about key management complexity. Institutions managing billions in assets worry about operational security around private keys. Losing a password means losing access permanently. No customer service. No recovery process. That risk feels unacceptable when fiduciary duty requires protecting client assets.

But complexity in key management is an infrastructure problem, not an inherent limitation. Early email was complex. Early internet required technical knowledge. Over time, interfaces improved and complexity got abstracted away. The same evolution is happening with blockchain key management. Solutions exist for institutional-grade self-custody that preserve user control while providing operational safeguards, recovery mechanisms and compliance tools.

The question is whether institutions will adopt those solutions or default to recreating custodial models because that feels safer in the short term.

The Future of RWA Tokenization: Efficiency Upgrade or Fundamental Restructure?

Remember the progression. Treasuries tokenized first because they are simple, standardized and low-risk. Corporate bonds followed because Treasuries proved the infrastructure worked. Real estate is emerging because bonds demonstrated that complex assets can tokenize successfully. Equities, derivatives and structured products are coming next. Each asset class moving on-chain adds to the total value flowing through custodial infrastructure.

If the industry chooses custodial concentration, blockchain becomes an efficiency upgrade to the existing system rather than a fundamental restructure. Settlement gets faster. Transparency improves. Costs decrease. But the underlying power dynamics stay the same. Intermediaries still control access, regulation still flows through choke points while systemic risk still concentrates in a handful of institutions.

If the industry moves toward distributed custody models where ownership and control remain with asset holders, blockchain becomes what it was designed to be. A way to verify ownership and transfer value without requiring trust in intermediaries. That model is harder to implement at scale, as it requires new infrastructure, new compliance approaches and new thinking about risk management. But it also eliminates the single point of failure that custodial concentration creates.

The choice is not obvious. Reasonable people will disagree about trade-offs between operational simplicity and systemic resilience. But as tokenization scales from billions to trillions, the question deserves more attention than it currently gets.

We have been building infrastructure that makes trusted intermediaries optional. Now we’re choosing to use them anyway. While this might be the right decision, it should be a decision taken consciously and based on actual necessity, not just institutional inertia or fear of complexity.

Because if we tokenize the global financial system while preserving custodial concentration, we will have missed the entire point.