I've never really understood the argument that quantum computing could break Bitcoin. Even if it did manage to crack one address successfully, that is just one address...there will not be a stage where it can suddenly crack them all. To be able to start brute forcing thousands of addresses, you have to do hundreds first...and before that, tens, and before that one....and to do 10, you'll need to put it 10x the computational power than one...and if a quantum computer can't even crack one yet, then how long will it take before it can do 10? That's my train of thought anyway...and it completely disregards if the core devs will push an update to make Bitcoin resistant if the day ever comes where one is successfully cracked by quantum computing.
I think devs won't just do nothing when quantum computing does cracked an address so I am sure they will find a way to prevent if there is or even make it more impossible to crack.The best contribution you can do is to read about the topic before creating a new post 
It has been already discussed and the conclusion is: There is a risk but there are some solutions for it. The Quantum Computin still not a risk for cryptos because the amount of quibits is low, but in the future the only option will be to integrate the anti-quantum encription created by the nist, there are 3 algorithms made with this propose, you can google them.
https://en.wikipedia.org/wiki/Post-quantum_cryptography
And also locking this thread would really contributed to the forum. We know that devs won't just watch bitcoin's threat to succeed. If only OP will make a research or just type the questions he has and see if there's someone who have the same question and if there's any answer to it.It has been already discussed and the conclusion is: There is a risk but there are some solutions for it. The Quantum Computin still not a risk for cryptos because the amount of quibits is low, but in the future the only option will be to integrate the anti-quantum encription created by the nist, there are 3 algorithms made with this propose, you can google them.
https://en.wikipedia.org/wiki/Post-quantum_cryptography