David Duong, head of global investment research at Coinbase, has issued a warning about the potential risks quantum computing poses to Bitcoin's security. He highlighted that approximately one-third of Bitcoin's supply could be vulnerable to quantum computing attacks, as the public keys for these coins have already been exposed. Duong emphasized that while quantum computing is still developing, its threat to Bitcoin's digital signature security is becoming increasingly real. The $3.3 trillion cryptocurrency market may be underestimating these risks, according to Duong. He noted that the primary concern is not mining efficiency but the potential for quantum computers to derive private keys from public keys, enabling direct theft of Bitcoin assets. This concern has been echoed by institutions like BlackRock, which have identified quantum computing as a risk in their Bitcoin ETF filings. Some experts predict that quantum computing could threaten Bitcoin's cryptographic security within the next 4–5 years.