Quantum computing is a real threat. However it is not just to Bitcoin, it is a threat to cryptography as we know them. When quantum computing is a reality, most encryption that we are using today can be broken.
The media like to draw attention to quantum computing being a threat to cryptocurrencies but the fact is that it will be a threat to most traditional infrastructure used in military, communications and even banking
Hi @culgin
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.