Hello Hydrogen, i don't think google's quantum computer is behind this price drop. I know it looks like a panic move but if quantum computer break bitcoin we can recover it with an update and a hardfork.

Not only google us behind Quantum computer, they are the ones with the most powerful quantum computer but IBM has a nice toy too. A couple of weeks ago i read some news about the new quantum computer from IBM, you can see more info here: https://www.ibm.com/quantum-computing/

And about quantum computer breaking bitcoin, we have a thread with a nice explanation about how will be hard to see that happening... https://bitcointalk.org/index.php?topic=5157696.0