Galaxy Digital is putting $5 million toward making Bitcoin quantum-resistant, a move that signals growing institutional urgency around what cryptographers call “Q-Day,” the moment a quantum computer becomes powerful enough to crack the encryption underpinning Bitcoin’s security.
Government experts have warned that Q-Day could arrive as soon as 2030.
The quantum clock is ticking
Galaxy Digital published a report on March 19, 2026, concluding that Bitcoin’s quantum vulnerabilities are significant but manageable.
The technical concern centers on elliptic-curve cryptography, specifically ECDSA-256, which Bitcoin uses to secure private keys. A sufficiently powerful quantum computer could reverse-engineer private keys from public keys, effectively letting an attacker spend someone else’s Bitcoin.
