Yes, I agree with you, I think it's just a hoax because until now there has been no official announcement from Google about quantum computers. and I think if a quantum computer does exist then I'm sure bitcoin developers will improve security systems and strengthen block security. I'm sure bitcoin developers will try hard to strengthen the bitcoin system and network.
Fake news or not I believe it's just a matter of time until we reach an unimaginable computer capability to calculate enormous number and that's technology development that can't be stopped. However, if there's any computer like that out there. i'm pretty sure that it'll not be in the hand of someone unresponsible. But, there's always a chance that it could go against any cryptocurrency so we should actually put our concern here rather than denying the reality.
From the point of view of people from the past, we currently have unimaginable computing power, when you can crack old crypto systems on your home computer in seconds, but it really doesn't mean much, because crypto systems evolve to match new challenges. Quantum computers are still extremely theoretical/experimental, but we already have algorithms that can resist them. And algorithms will keep improving in the future, so I'm sure the will have an upper hand over quantum computers.