I completely agree with your post except for the last part.
Either way, crypto is just more costly to use than traditional systems when you properly factor those risks.
This all depends on the risks involved in the traditional systems you're comparing the cryptocurrency to. Traditional systems are exposed to some kind of risk that cryptos aren't. For example, with cryptocurrency your account can't be seized or frozen by authorities, be them governments or banks. With some cryptocurrencies you are also at much lower risk of hyperinflation (or inflation in general).
In many cases the risk involved in using cryptocurrencies will outweigh the risk posed by traditional finance, but that's not true in all cases. In some parts of the world, the risks involved in traditional finance are significant...
AI developers are like the modern version of alchemists. If they can just turn this lead into gold, this one simple task, they'll be rich and powerful for the rest of their lives!
Transmutation isn't really possible, not the way they were trying to do it. Perhaps AI isn't possible the way we're trying to do it now, but I doubt that will stop many people from trying. And I do expect that it will be possible somehow, we'll likely get there someday, just not soon.