I think it's similar to the CDOs used in the housing crisis. You take something of little to no value, wrap it up with all sorts of complexity but then present it as this simple thing you can buy and trade that supposedly has value. People lap it up without understanding the underlying value, which is effectively none. Bitcoin takes up energy to be born. Thus, a bitcoin starts life with negative value. It only attains "value" by someone willing to exchange normal currencies for it. Then it increases in value when someone else pays more. But there is no backing value. Yes, fiat currencies no longer have a gold standard, but there is a ton of value backing the fiat currencies. The dollar is backed in value by the U.S. economy. Bitcoin and other cryptocurrencies are entirely ephemeral. I think I saw someone relate them to the Beanie Baby crazy. At least at the end of that craze, you had a Beanie Baby left, as opposed to ones and zeroes on a hard drive with cryptocurrencies.
> There is seemingly also a small fraction of true believers, idealists and evangelists who seem convinced that all of this could replace both states and banks without ending up much worse.
I think a lot of that culture comes from staunch libertarian ideals and also the "free software" crowds, such as GPL enthusiasts. It just is not how human society works and will never work. I saw it in a thread in regarding a commonly used software library that has a GPL license. The author of the package said they would never consider any other license, even while the other thread posters were requesting a license that would allow them to use it in proprietary code but actually pay for that use. People were essentially stating that no one, other than hobbyists, will ever use the package because they can't in their jobs and companies but that they would be willing to pay for a non-GPL license, and the authors staunchly stood behind their ideals. Thus, no one uses it.
I feel cryptocurrencies are very similar. Taking a hardline approach to the decentralization means it will never be incorporated into anything other than hobbyist and enthusiast use.