Quote from: crypthough on October 03, 2019, 01:20:41 PM

Theoretically possible, but I think that it's also possible to find a solution. Beyond that it's at the moment and in the nearly future very hard and expensive to get a quantum computer and besides that a quantum computer must be developed for the purpose of destroying bitcoin (to solve SHA256), with a normal quantum computer, you don't have the "instruments" to solve SHA256 you have to develop a special system for the quantum computer. In my opinion the effort is too big for most of the people. Furthermore, quantum computer's can also be used to attack other things like bitcoin nearly everything could be hacked, and there are some big banks for instance, which would be more profitable and easier to attack.

As per reading some articles concerning the Google's quantum computer, I think what they are pertaining to the specific quantum computer that 'reached the quantum supremacy' is the 72 qubits quantum computer. In my opinion, with that specific Technology, it is not possible to decrypt private keys, and password even though the computing power is too much. The reason behind is because google isn't allowing external users to use their quantum computer, and also, it is not open source in some point that, only certain program can run through it.