Justin Sun, the founder of TRON, has expressed a bearish outlook on Bitcoin, citing potential threats from advancements in artificial intelligence and quantum computing. He argues that current market prices for Bitcoin, particularly those held via ETFs, do not adequately account for these long-term cryptographic risks.
The concern centers on the vulnerability of Bitcoin's security to future technological breakthroughs. In March 2026, Google Quantum AI estimated that fewer than 500 000 physical qubits could compromise Bitcoin's cryptography. Furthermore, on October 15, researchers demonstrated significant progress with the Willow chip, which achieved 99.99% fidelity and reduced errors by approximately 40-fold.
Data from Glassnode suggests that 6,04 million BTC, representing about 31.2% of the total mined supply, are held in addresses with publicly visible keys. Sun notes that these assets could be at risk if decryption capabilities advance, potentially leading to massive selling pressure. He also highlighted the difficulty of implementing a hard fork to protect these assets due to Bitcoin's decentralized nature.
In response to these challenges, Coinbase issued a report on October 13 recommending that the community begin preparing for quantum threats well in advance. The exchange suggested exploring options such as flexible output types and staged hybrid protection, noting that ecosystem migrations and consensus changes can take several years to complete.
