Blockchain currencies are not intended to be investment vehicles. They are intended to be mediums of exchange that bypass the big-government/big-credit-card industrial complex and their skimming operations.
they see a lottery ticket.
Blockchain isn't going away, or the currencies based on it.
Blockchain is basically an accounting system that is completely transparent and (almost) impossible to forge because is it based on hashing (one-way encryption) and distributed across thousands of servers.
It could make government completely accountable. Anybody could audit it and trace where every penny came from and went to.
That's a game-changer when it comes to government ethics, which is an oxymoron.