I do accept however that a medium term dollar equivalent (at today's values not including hyperinflation) could be $1000 or $0 with a low (2 digit) dollar value being less likely than $0.
How is it possible that a low 2 digit dollar value is less likely than zero.
Why ? Because it needs to pass through the low two digit and single values to get to zero. If this ever happened it would bounce so high multiple times before it ever got to zero.
So if the value ever goes to zero low 2 digit values are 100% guaranteed and so are both low and high single digit values.
If its worth $X and something happens to make it worth $0, who will be paying $2 for it to go to $2 "on the way"? ...
I'm not sure $0 Bitcoin is likely. Imagine the worst case scenario, where you can no longer buy *anything* with Bitcoin:
I, for one, would gladly spend $10 to buy up the world's supply of Bitcoin, simply to be able to say that i own something once worth billions of dollars, an intangible, improbable & counterintuitive thing which trolled the financial sector like a boss, the purely digital entity on which so many hopes & dreams drove, throttle floored, into oblivion.
I'd also buy up some (at that point, 100% useless) ASICs -- simply because i love defunct tech -- and mine. I once restored a 1943 microwave spectrum analyzer. Was a huge chunk of rack gear, with a waveguide sticking out of the side. I had 0 use for it, and 0 plans for reselling it. I just dug it.
TL;DR: Bitcoin's too neat to die.
I like how you did not mention the S word.