Alex Thorn, head of research at Galaxy Digital, has opined that quantum computing is a "bigger threat" than people tend to realize. 

Moreover, he claims that the available options to fix it for Bitcoin are worse than people realize. 

Thorn has clarified that other cryptocurrencies will also be vulnerable to this kind of attack. 

"To be clear, the quantum attack to which Bitcoin is vulnerable is one that affects all types of public key cryptography. And all cryptos," he stated. 

Thorn has also warned that Bitcoiners will not know when the first Bitcoin attack happens. 

That said, a potential quantum attack would be a national security issue.