Cardano co-founder Charles Hoskinson has warned that Bitcoin could lose its position as the largest cryptocurrency if its governance system cannot coordinate a timely response to the long-term threat of quantum computing.

Hoskinson made the comments during an interview with The Starting Block published on July 24. He described Bitcoin as “frozen in time,” arguing that major changes to the network require broad agreement among developers, miners, node operators and users. In contrast, he said Cardano’s formal voting system gives its community a clearer path for approving upgrades.

His remarks were framed as a governance argument, not as evidence of an imminent quantum attack. Bitcoin developers are already discussing post-quantum migration plans, including BIP 361 and new signature designs, while Cardano’s onchain governance allows ADA holders to vote on upgrades. However, Cardano’s own governance process has also produced coordination disputes.

CARDANO FOUNDER WARNS BITCOIN COULD LOSE ITS #1 SPOT. Charles Hoskinson says Bitcoin could eventually lose its dominance if its governance fails to respond properly to the threat of quantum computing. The concern? A sufficiently powerful quantum computer could potentially… pic.twitter.com/H7zcu0HqZk — That Martini Guy ₿ (@MartiniGuyYT) July 25, 2026

CARDANO FOUNDER WARNS BITCOIN COULD LOSE ITS #1 SPOT. Charles Hoskinson says Bitcoin could eventually lose its dominance if its governance fails to respond properly to the threat of quantum computing. The concern? A sufficiently powerful quantum computer could potentially… pic.twitter.com/H7zcu0HqZk

Hoskinson frames quantum security as a governance test

Bitcoin relies on elliptic-curve cryptography to prove ownership of funds. A sufficiently powerful quantum computer could, in theory, derive private keys from exposed public keys and authorize transactions without the owner’s approval. The U.S. National Institute of Standards and Technology has described this as a future risk and has already standardized algorithms intended to resist quantum attacks, including post-quantum digital signature standards for future systems.

The issue matters for public blockchains because cryptographic migrations are not only software upgrades. They affect wallets, exchanges, custody systems, hardware devices and users who may need to move funds or adopt new address types. For Bitcoin, that coordination would have to occur without a formal governance body that can compel participants to accept a change.

Hoskinson said quantum computing would test whether Bitcoin can adapt without weakening the qualities that support its value. He said BTC may not remain the leading cryptocurrency if its governance cannot make progress on the issue. He did not identify another network that would replace Bitcoin, and he did not provide a date for when such a threat could materialize.

Bitcoin developers are studying migration options

Bitcoin does not have a formal onchain voting body. Developers can propose code changes, but users and node operators decide whether to run them. Miners, exchanges and wallet providers also influence whether an upgrade gains enough support across the network.

That slower process helps avoid frequent rule changes, but it can also make urgent coordination more difficult. Work on quantum resistance is already underway. Bitcoin Optech has tracked BIP 361, which outlines a phased move away from current ECDSA and Schnorr signatures after developers select a post-quantum system. Other proposals include new address formats, hybrid signatures and recovery paths. These ideas remain under review.

Any migration would also require wallets, exchanges, custodians and holders of long-dormant coins to move funds without splitting the network or creating conflicting ownership rules during a limited transition period.

Some researchers estimate that millions of BTC are held in addresses whose public keys are visible. Those coins could face greater exposure if a capable quantum computer appears. Modern Bitcoin address types generally do not reveal a public key until funds are spent, but older outputs, reused addresses and previously spent outputs can leave public keys onchain. The timing remains uncertain, and researchers continue to debate which coins should move, be frozen or remain spendable.

Cardano points to formal onchain governance

Cardano completed its transition to full community governance through the Plomin hard fork in January 2025. ADA holders can vote directly or delegate voting power to representatives known as DReps. Stake pool operators and a constitutional committee also participate in selected decisions. The system can approve hard forks and treasury withdrawals onchain.

Hoskinson said Cardano could use that structure to vote on a migration away from infrastructure vulnerable to quantum computing. However, Cardano has not completed such a migration. Its governance system would still need to evaluate technical designs, approve funding and coordinate users, developers and service providers around any change.

The process has also created disputes. Cardano delegates rejected or challenged several proposals linked to Hoskinson and Input Output during 2026. One request included research into Leios scaling and quantum-resistant cryptography. Formal voting therefore does not guarantee approval of a founder-backed plan.

Cardano prepares scaling work alongside security research

Hoskinson also said Cardano is preparing for its largest upgrade and claimed the network would become “60 times faster.” Development updates show teams are testing Ouroboros Leios, a design intended to increase throughput by separating block roles and allowing more work to be processed in parallel. Developers continue to integrate the prototype with Cardano node software.

The 60-fold figure remains Hoskinson’s estimate rather than a measured result from the live network. Leios still requires testing, technical review and governance approval. Cardano’s recent van Rossem hard fork shows that DReps, stake pool operators and the constitutional committee can coordinate an upgrade.

Hoskinson described Cardano as a “spiritual successor” to Bitcoin because it keeps a fixed-supply monetary model while adding smart contracts and formal governance. Bitcoin supporters may reject that comparison, since Bitcoin’s limited change process is part of its security model. Bitcoin depends on broad offchain consensus, while Cardano records many decisions directly onchain.

The quantum issue remains unresolved for both networks. Bitcoin developers are designing migration options, while Cardano is funding research and building governance tools. Neither network has deployed a complete post-quantum transaction system. The practical test will come when developers agree on secure cryptography and communities must decide how to move users and funds.