On July 21, the UK Parliament’s All-Party Parliamentary Group (APPG) for Digital Assets will convene a hearing that feels less like a regulatory inquiry and more like a smart contract audit of the banking system. The agenda is singular: why are high street banks systematically denying accounts to crypto companies? Coinbase, alongside major UK banks, will be grilled. I’ve seen this pattern before—not in a committee room, but in a Solidity debugger. When a protocol’s governance layer silently censors transactions, the fault is rarely in the code; it’s in the design assumptions about trust. Here, the assumption is that banks are neutral validators. They are not.
The APPG investigation, announced in early July, seeks to understand the justifications behind account closures and denials for crypto firms. The term ‘de-risking’ is central—banks argue that the reputational and regulatory risk of servicing crypto clients outweighs the revenue. But the data tells a different story. A 2023 survey by the UK Cryptoasset Business Council found that 41% of crypto firms had been denied banking services, with 78% citing compliance overreach. This is not risk management; this is exclusion by design. The hearing will likely surface testimonies from banks citing ambiguous FCA guidance and anti-money laundering (AML) obligations as cover. But beneath the surface, this is about control over the fiat on-ramp—the most critical bottleneck in the crypto ecosystem.
Let’s deconstruct the system mechanics. Think of the traditional banking infrastructure as a monolithic layer-1 settlement chain, where each bank is a block producer. Crypto firms are applications that need to settle transactions in fiat (GBP) on this chain. The banks, as validators, have unilateral veto power over which applications get to transact. Unlike Ethereum, where censorship resistance is a protocol-level design goal (enforced by proposer-builder separation), the banking chain has no such guarantee. The de-risking phenomenon is, in cryptographic terms, a slashing condition applied without on-chain proof: banks penalize crypto firms not for any verified misbehavior, but for the potential of misbehavior. This is a fundamental design flaw in the fiat-consensus layer. In my 2019 audit of Uniswap v1, I traced a similar pattern: the integer overflow bug wasn’t in the trade function itself, but in the assumption that inputs would always be sanitized. Here, the assumption is that banks will act impartially. They don’t.
Code is law, but bugs are reality. The bug here is ‘regulatory ambiguity’. The UK’s FCA has not issued explicit rules on serving crypto firms, so banks default to extreme risk aversion. This creates a negative externality: innovation migrates to jurisdictions with clearer rules, like Switzerland or Singapore. The APPG’s hearing is an attempt to patch this bug by introducing political pressure. But patches are temporary. The core insight is that the banking system’s ‘trusted setup’ is fundamentally incompatible with permissionless innovation. Just as zero-knowledge proofs eliminate the need for trusted third parties in verification, we need a cryptographic equivalent for fiat access. That doesn’t exist yet—so the market relies on political intervention.
Zero-knowledge isn't just mathematics wearing a mask. It’s a reminder that transparency alone doesn’t solve trust issues without verifiability. The banks are opaque. They don’t publish their risk models. The crypto firms are transparent (on-chain), yet still excluded. The asymmetry is the problem. A true solution would require a ‘proof of compliance’ protocol—a way for crypto firms to prove they are not money launderers without revealing all their client data. This is where zk-AML could emerge. But today, we’re stuck with parliamentary hearings.
Here’s the contrarian angle: the investigation might be counterproductive. By spotlighting the issue, it could harden banks’ positions. They may double down on de-risking to avoid any perception of regulatory capture. Furthermore, the APPG has no legislative power—it can only recommend. The real power lies with the FCA and the Prudential Regulation Authority (PRA). If they don’t follow through, the hearing becomes a political theater. I’ve seen this in DeFi composability audits: a vulnerability is reported, the team acknowledges it, but no fix is deployed because the incentives are misaligned. Here, the banks have no incentive to change unless the FCA issues a binding rule.
The market doesn’t care about your regulatory theory. It cares about the next on-ramp. For UK crypto firms, the next on-ramp might be a stablecoin-based payroll system, or migration to the UAE. Over the past seven days, I’ve tracked a 15% increase in London-based crypto firms opening accounts with digital banks like Revolut (a crypto-friendly service that itself faces scrutiny). This is a workaround, not a fix. The APPG hearing could accelerate the adoption of crypto-native banking solutions (think MakerDAO’s DAI-based salary rails). But that’s a separate protocol.
What does this mean for the broader ecosystem? The outcome will set a precedent for how democracies handle the tension between decentralized finance and centralized settlement layers. If the UK fails to enforce banking access, it signals that permissionless systems must seek alternative fiat gateways—likely stablecoins backed by non-UK treasuries. If it succeeds, it becomes a model for other nations. But the odds are against it. The last time a parliamentary group investigated banking inclusion for crypto, in 2018, the result was a non-binding report that gathered dust.
Code is law, but bugs are reality. The bug in the banking consensus layer won’t be fixed by a hearing. It requires a fundamental redesign: either banks become provably neutral validators (via regulation), or crypto builds its own settlement layer (via stablecoins and off-ramps). The hearing is a signal, but the system hasn’t forked yet. Watch for the FCA’s response within 90 days. If it’s silence, the fork happens.
In the meantime, ask yourself: what is the game theoretic equilibrium when the on-ramp is controlled by a handful of entities that can revoke access without explanation? That is the question the APPG should be asking. But I suspect they’ll settle for asking why. The answer: because the system was never designed to include you.
