You are forgetting about something: mindsets, psychology, philosophy and culture. Even if the "experiment" that is bitcoin fails in economic terms, you have made millions of people more conscious of how money works, what is happening with their fiat reserves and how is actually possible to free yourself from being played with.
Another historic example - many railways went bankrupt, yet we still have them and we still use railways as a means of transport. It was the first time people of moderate means could actually leave their surroundings at a cheap price and discover that there was something else in the world apart from their villages. That changed culture (people of modest means did not vacation before) and made people more free. That is my point, this changes everything regardless of the economic incentives.
That is the thing about crypto, there is no coming back from it. I do not care if quantum computing starts breaking up every single crypto apart and making them worth zero, it is not something that I would care, why? Because I know that people are aware that we need OUR money, and that is what will help us.
A regular citizen of USA doesn't have anything in common with the richest of USA, but they do have a lot of in common with the other Citizens of European countries for example, whereas European citizens have nothing in common with the elites of the European world, but they have with regular American, meanwhile USA and Europe elites and wealthy are practically the same thing.
So long story short we now that Dollar will not save me, no matter how much I have, euro won't, pound won't, ruble won't, yuan won't nothing will be saving me because those are government money and they only work to make the rich richer and powerful more powerful. So what we need is crypto in idea, it could be bitcoin it could be coinbit who cares what the name is, one day bitcoin may die but something else will come up because we now know that we need it.