The jealousy argument just reveals the character and knowledge level (and maybe age) of the people who make up the cryptomania movement.
Money is not a "asset class", it is a claim on other people's time and the economic value they can generate with their work and talent. It is only "worth" the value of the community that accepts it as a legitimate tender. If a token dollar is worth something it is because a vast range of people will happily exchange it for something trully valuable.
The economy of a community made up of speculators and extortionists is worth exactly zero (if not negative) and it is a matter of time before this transpires.
The only positive thing to say about bitcoin and friends is that is showed to many more people that monetary system alternatives are in principle possible. Ofcourse some people have been for ages working on complementary currencies and such. Digital and programmable currencies are the future, but they will have to become real economic tools that will fix true problems before they stand a chance against the current system.