To me cryptocurrency sounds like monorail or electric bus. Both technologies were designed to fix one aspect of existing transport systems. Monorail concept ap

To me cryptocurrency sounds like monorail or electric bus. Both technologies were designed to fix one aspect of existing transport systems. Monorail concept appeared around 1900, trying to reduce the elevated railways problem. One designer thought of reducing the use of metal. Wuppertal suspension railway uses much more metal for tracks than conventional trams. There is a special monorail in Britain, built in 1940s, that stands on A-shaped legs. The only rail is supported by some metal triangles, using the same amount of metal. Later models, first built in Disneyland, use concrete (which contains a lot more iron in the concrete itself besides the reinforcement), and rubber wheels (sacrificing the advantage of low friction). Their biggest problem is switches: they're heavy and huge. Suspended monorails use big box instead of a rail, because swaying carriages are uncomfortable, and to hold them, the track must resist the force of a long lever. Errr... what was the reason to go for all that, in the first place? Make simpler track and use less rails/metal? Not achieved at all. Electric buses... just 2 words: they're 3-5 times more expensive, and a whole route of e-buses requires just as much electric equipment as trolleybus line. Plus, e-buses spend twice more time charging than riding. Which means you need to triple the fleet of triple-quintiple more expensive vehicles. Even if battery technology progresses, as some insist, let it improve for private, not public money. It seems that blockchain is similar: couple of advantages, lots of big disadvantages.