Arthur Hayes has exited his entire Zcash position after the disclosure of a critical Orchard pool vulnerability that raised fresh concerns about the privacy coin’s supply integrity and triggered a sharp market selloff.
Key Takeaways
- Arthur Hayes sold his entire Zcash (ZEC) position after a newly disclosed Orchard pool vulnerability raised concerns about possible counterfeit token creation.
- The flaw reportedly existed since the NU5 upgrade in 2022 and was patched through an emergency network upgrade in early June 2026.
- ZEC plunged more than 35%, with some exchanges recording losses approaching 50% during the selloff.
- Developers say there is no evidence of exploitation, but they cannot cryptographically prove that no counterfeit ZEC was minted while the bug existed.
What Happened?
BitMEX co-founder Arthur Hayes confirmed that he had liquidated his entire Zcash position after a critical flaw in the network’s Orchard shielded transaction pool became public. The disclosure quickly rattled investors and sparked a sharp decline in ZEC’s price as traders reassessed the risks surrounding one of the crypto market’s leading privacy focused assets.
The issue has renewed debate over the challenges of verifying token supply within privacy preserving blockchain systems, even when no confirmed exploitation has been detected.
Orchard Vulnerability Raises Supply Integrity Questions
The controversy centers on a flaw discovered within Zcash’s Orchard pool, the network’s latest shielded transaction system introduced as part of the NU5 upgrade in May 2022. Orchard was designed to enhance privacy through advanced cryptographic technology powered by the Halo 2 proving system.
According to disclosures from Zcash developers and security researcher Taylor Hornby of Shielded Labs, the vulnerability involved insufficient constraints in elliptic curve multiplication within the halo2_gadgets crate. In theory, a malicious actor could have crafted inputs capable of bypassing certain validity checks and creating counterfeit ZEC that would still appear valid within the Orchard pool.
Hornby identified the flaw on May 29, 2026, using AI-assisted formal verification techniques. Developers moved quickly to address the issue, deploying an emergency fix through a network upgrade completed in early June.
While the patch closed the vulnerability, a larger concern remains. Because Orchard transactions are shielded by design, there is currently no cryptographic method to definitively prove that counterfeit ZEC was never created during the nearly four year period when the flaw existed.
Developers have repeatedly stated that there is no evidence of exploitation, but the inability to provide absolute certainty has become a major point of concern for investors.
Hayes Declares “The Holy Trinity Is Dead”
Hayes reacted swiftly after details of the vulnerability became public.
In a post on X, he wrote:
The Holy Trinity is dead. Sadly due to the Orchard Pool exploit, I had to dump our entire $ZEC bag.
— Arthur Hayes (@CryptoHayes) June 5, 2026
– While I think it’s extremely unlikely of any minting, it cannot be formally cryptographically proved impossible
– The privacy from AI, govt, big tech narrative demands perfection…
Hayes argued that privacy focused cryptocurrencies operate under a different standard because their value proposition relies heavily on trust in cryptographic guarantees.
The sale also marked the end of Hayes’ self described “Holy Trinity” portfolio, which previously included HYPE, NEAR, and ZEC. Reports indicate that he has since rotated capital into Worldcoin, citing developments related to artificial intelligence and broader political trends.
ZEC Price Suffers Heavy Losses
The market reaction was immediate.
Following the disclosure and Hayes’ public comments, ZEC experienced one of its sharpest declines of the year. The token fell from levels above $600 to significantly lower prices within hours, with some trading venues recording declines of more than 35%, while others showed losses approaching 47%.
Trading activity surged as investors rushed to adjust positions. Daily spot volume exceeded $1.7 billion, while nearly $49 million in leveraged positions were liquidated. Long traders accounted for the overwhelming majority of those losses.
The selloff erased a substantial portion of Zcash’s gains from 2026, a year in which the privacy coin had emerged as one of the sector’s strongest performers.
Privacy Coins Face Renewed Scrutiny
The incident has sparked broader discussion across the cryptocurrency industry about the tradeoffs associated with privacy preserving networks.
Investor Udi Wertheimer pointed to historical examples of inflation related bugs and argued that private ledgers create unique verification challenges compared with transparent blockchains. Meanwhile, Helius CEO Mert Mumtaz noted that software vulnerabilities have appeared across many blockchain ecosystems, emphasizing that the critical question remains whether exploitation occurred before the patch was implemented.
Zcash supporters have also defended the project’s response. Barry Silbert backed the disclosure process and stated:
Developers are reportedly working on future upgrades that could migrate balances into a new shielded pool and strengthen verification mechanisms designed to reassure users about supply integrity.
CoinLaw’s Takeaway
In my experience, crypto markets can forgive bugs much faster than they forgive uncertainty. What makes this incident significant is not that counterfeit ZEC was proven to exist, because no evidence suggests that happened. The bigger issue is that the network currently cannot provide absolute proof that it never happened.
I found Arthur Hayes’ reaction particularly notable because it reflects how major investors think about risk. Even a very small possibility of undiscovered inflation can be enough to break an investment thesis built around cryptographic certainty. Zcash now faces the difficult task of rebuilding confidence and proving that its privacy technology can coexist with strong supply verification guarantees.
