It's al still stories, quantum is just a plot-twist. The value of bitcoin is all a story in our heads, and the threat from quantum, that's a threat to the integrity of the story. This is story on story violence. Which is how all money goes up and down. Think about it. Anyone could come up with anything and propose it as a money. As long as we all agree it has value because x then it has value, and if we all agree that it loses value because y then it loses value. I could come up with a currency that has one coin for every letter in the alphabet, and we all agree it has value because it's derived from the alphabet, it's the holy 26. Then the government mandates a change to the chinese alphabet and it collapses. oops.