---
title: "What Is Q-Day? The Quantum Threat to Bitcoin Explained"
url: https://thecoingazette.com/what-is-q-day-the-quantum-threat-to-bitcoin-explained/
date: 2026-07-03
modified: 2026-07-03
author: "Coin Gazette Editorial"
description: "Experts warn quantum computers could someday forge Bitcoin’s digital signatures, allowing unauthorized transactions."
categories:
  - "Crypto News"
tags:
  - "Bitcoin"
  - "quantum computers"
  - "Technology Guides"
  - "transactions"
word_count: 13
---

# What Is Q-Day? The Quantum Threat to Bitcoin Explained

Experts warn quantum computers could someday forge Bitcoin’s digital signatures, allowing unauthorized transactions.