The next generation will earn in crypto currency, spend in cryptocurrency via simple to use (input your private key once, it's safe, honest) smartphone apps, pay their taxes by cryptocurrency (alas, through not so easy to use government apps,) and wonder what the hell people ever bothered with cash for.
Whether you think this is progress or a very, very bad thing, those cryptos and companies which end up providing large parts of the network, structure and maintenance of this everlasting trillions of dollars industry will obviously 'moon' up to 100 or 1000 times their current worth, just like google, apple and amazon did.
Now, which ones are those do you reckon?