Also people keep on asking the same or similar question about bitcoin about quantum computing. Did you know that even the banks and many organizations will be affected by quantum computers?
Just do not reuse bitcoin address and you will not be affected.
If all of this stuff becomes a reality, BTC wouldn't have the biggest target on its back, though it would still be there.
And I do believe that by the time it - will - happen, BTC will be ready for it..