I am new to the form, but I learned a lot by reading your post.I think thats too early to presume, Its just an announcement to create a hype! But quantum computing is achievable but i think its not like that easy or instantly to create a new hybrid computing machine and change all of the sudden of what we use today, If those quantum computing machines was already in existence i dont think cryptocurrency developers are not able to cope up with a solution with that so called threat