This sounds remarkably similar to your
last thread I saw, where there was a great deal of emphasis on "faith" being the primary driver and that faith alone wasn't sufficient. It may well be true to say that in the hypothetical situation where every single participant lost faith in Bitcoin, it almost certainly would collapse. Sounds perfectly reasonable. But that's also true of every currency that has ever existed or will ever exist. Maybe consider removing the "crypto" part from the title, then add the word "eventually" and I might even be tempted to agree with you.
But for now and for the foreseeable future, it's difficult to envision a scenario where all the people across the world who have spent countless hours of their time and effort on Bitcoin would suddenly abandon it all. Every day, more and more people dedicate their focus to improving and evolving this nascent technology. We've recognised the advantages and we're not giving up. We don't just believe the world will be a better place for our efforts, we know it. People work tirelessly on this and will fight to keep it. But the best part is, we don't really have to fight, because no one can easily stop us anyway.
If anything, fiat is the stuff many of us are losing faith in. If you look around the world, it's the traditional currencies that are collapsing. Nation states have begun their
race to the bottom, where, despite being a race, there are no winners. All the "
legal ability", as you put it, in the world isn't going to stop places like Venezuela and Puerto Rico annihilating their own economies. And I suspect others will soon follow, because they all chase perpetual growth at the expense of common sense. So in a world capable of being that shortsighted and downright stupid, surely we're better off removing ourselves from such insanity? We're simply going to sit back and watch them destroy themselves.