Most probably, quantum computer will not be invented overnight. Hash functions are not seriously vulnerable, but ECDSA signatures are. Fortunately, most funds are sitting on never-used addresses which are basically the hashes of the public keys, which are not instantly crackable by a quantum computer. People will probably have time to switch to a new signature method which is resistant to QC. Like Lamport Signatures, for instance. http://en.wikipedia.org/wiki/Lamport_signature
The price will dip, but may recover pretty quickly, like when the famous v0.7/v0.8 fork that happened this March.
If the Bitcoin can't be fixed and becomes unusable, its value will instantly become zero and everyone's savings in it will become permanently lost.
The price will dip, but may recover pretty quickly, like when the famous v0.7/v0.8 fork that happened this March.
If the Bitcoin can't be fixed and becomes unusable, its value will instantly become zero and everyone's savings in it will become permanently lost.