Everyone should have a look at the article just to see the picture of the computer that was revealed at CES, it is absolutely beautiful.
I like the picture
When there are many more quantum computers in out there, it means the new era started and agree or not, and we need to prepare too.
The crypto will be fine and I don't think that it will make crypto in dangerous because I am sure that the crypto can protect the network and every developer will make another upgrade too.
I think we don't have to be afraid of their presence because it is what will happen from now on. When the new technologies come out, there will be new things that we need to learn so we can follow that technology and use technology to protect our system.
But I don't know because it's only in my imagination.