No they're not. 3D printer companies are shutting down everywhere as the industry consolidates into a few players that make industrial grade machines. The hobbyist 3D printer is disappearing as services like Shapeways take over printing trinkets.
3D printing is here to stay, but not at its stratospheric valued future self from 2013.
The idea that every home would have a 3D printer is as insane as every person using Bitcoin.
Unlike Cryptocurrencies I actually have a use for a 3D printer and use one every week. Because I design things for a living and the 3D printer helps me in the creative process.
I agree they aren't.