but the ultimate bottom is the important thing.
But, there's not a nearly invariable ultimate bottom in bitcoin, that's what I pointed out. Difficulty adjustments change that temporary bottom every 2 weeks, but difficulty adjustments are affected by demand. It is, therefore, clear that the demand does affect the minimum cost, which doesn't happen with any other commodity or asset.
As you rightly said, there's a bottom value for gold, houses etc., but not for bitcoin. And I think you agree with me here:
if there was no demand. its not an instant $0 of the coin.. its a process.. the $25k minimum slowly drops as people drop out. and like i explained this slow drop is not a certainty of being $0 short term because the drop itself slowly going down can infact re-energise some desire/demand and thus keep the price active longer or re-birth a new demand.