It's a real threat. The amount of operations a quantum computer can perform is hard to imagine. It's a matter of knowing how true those advances are.
If this quantum project were completed, it would actually be a large-scale threat.
Blockchain technology must evolve and find a way to protect itself.
I fully support your comment, technology advances not only to decrypt but also to encrypt better and better.
Hi @yonnathang
Sometimes I'm wondering if Quantum computing wouldn't be simply to expensive to be used as a threat to bitcoin or any other crypto. It's a bit like saying that advanced robots will one day replace work done by cleaners (mostly cheap labor, immigrants etc).
It may simply not be economicaly justified.