Quantum computers currently can't break Bitcoin's security because they're not advanced enough. Bitcoin uses a special kind of math called "elliptic curve cryptography" to keep things secure, and right now, even the most powerful quantum computers struggle with solving these complex problems. If quantum technology improves, Bitcoin can update its security methods to stay protected.
If quantum computing were advanced enough to break Bitcoin's cryptography, it wouldn't just affect Bitcoin. The same technology would pose a risk to many other systems, including the security measures used by institutions like the US Navy and banks worldwide. These entities rely on similar cryptographic principles to protect sensitive information. The idea that quantum computing could compromise Bitcoin but not impact these other critical systems is unrealistic. The widespread repercussions across global security and finance highlight the improbability of such a scenario occurring without significant notice and preparation.