Well, exactly. She can see the picture of her grand-children. But what's the equivalent of the grand-children incentive for using bitcoin over her credit card or cash?

"Because we won't give her the choice" isn't the way bitcoin is going to go mainstream.

If you can figure that out, let me know and maybe I'll loop you in on the billions generated :)

Seriously though, most people could not conceive of what the internet of today would have looked like 20 years ago, so I'm thinking it's going to be something similar for crypto. Remember that some, like ethereum specifically, are applications platforms for running arbitrary code in a distributed way. Exactly what applications will come of that I really don't know, but I'm sure they will be figured out, and by that time the value will be obvious.

Well, to be honest, search engines, emails, ICQ, amazon, porn, mp3s and DivX came pretty quickly! Facebook, Uber and Wikipedia come to my mind as a later thing that was difficult to predict. Today's internet is better, we can even use it from a toilet stall with a device that fits in one's pocket! But is it really that different from the late 90s? I'm not so sure.

From a business perspective, its worlds different. Snapchat (say what you will), with its multi-billion dollar valuation, wouldn't have existed until we had the ability to get internet from a toilet stall with a pocket-sized device. My company, a SaaS for farmers, would not have been as valuable to our customers had mobile devices not been around, and people still had to use dial-up.

The internet used to be a bunch of usenet forums for geeks, now everybody uses it to some degree, which means that lots of businesses with real-world value are possible where they weren't before.

For crypto, anonymous payments, speculation trading, and currency exchange are the immediate innovations, but the Facebooks and Ubers of crypto have yet to be created.