> no conception of how to value the underlying asset
They have no conception of how to value the underlying asset because the underlying asset has absolutely no value. Bitcoin is one of the purest scams that has ever been conceived. Even subprime real estate, pets.com stock, dutch Tulip Bulbs etc. had some value. You're buying and selling a hash - a number. It's absolutely worthless. That people are being suckered into buying these, ASICs costing tens of thousands and backordered to make them etc. is a real close-up seat to how a bubble works, how a scam works, and how the luminaries in the tech field can be lined up in a row to endorse the scam. Is there a tech bubble? "Bitcoin" is the word that can answer that question as easily as "pets.com" and "Webvan" did 15 years ago. At least those companies actually performed a valuable service, Bitcoins are worthless.
In all fairness, the paper on which $100 bills are printed is quite worthless as well.
I think ever since people have stopped using gold and silver bullion (after arrowheads and knives) as currency items, there has been this consensus that money has the value that people give to it, not the value of its material (or, in BTC's case, immaterial) representations.
Further to your point: BTC at least has the property that someone cannot arbitrarily create a new unit (without doing the requisite, increasingly difficult, work).
What exists with BTC is 21 million or so unique valid hashes and no others can be created. With money, say USD, there exist trillions and no guarantee that some party (the government) will not create massive amounts of additional units.
It would also depend on the economics of said quantum computing. But yes, I'd expect the value to decline because one could not guarantee their currency anymore. Similarly if someone invented a teleporter that targeted US currency, it'd become worthless because a thief could just teleport it out of your pocket.
Not quite. USD will always be accepted by the United States Government. If you live in the US, you'll probably owe them taxes no matter what you're payed in, and as such, will always have some need for USD, and USD will always have some intrinsic value of "enough of this will keep the IRS from arresting me".
It's ability to be used to make better fake dollar bills would make it worth something, but the years in jail you might be subjected to if caught presumably drive the demand down.
They have no conception of how to value the underlying asset because the underlying asset has absolutely no value. Bitcoin is one of the purest scams that has ever been conceived. Even subprime real estate, pets.com stock, dutch Tulip Bulbs etc. had some value. You're buying and selling a hash - a number. It's absolutely worthless. That people are being suckered into buying these, ASICs costing tens of thousands and backordered to make them etc. is a real close-up seat to how a bubble works, how a scam works, and how the luminaries in the tech field can be lined up in a row to endorse the scam. Is there a tech bubble? "Bitcoin" is the word that can answer that question as easily as "pets.com" and "Webvan" did 15 years ago. At least those companies actually performed a valuable service, Bitcoins are worthless.