People need time, slowly they'll know about the reason behind the innovation. Maybe by then real potential of the technology and elimination of middle man will be understood and used.
You have a point on that. When it comes to potential source of money, people will be interested.
And as we have observed these years, the value of btc increased a lot of times.
So this volatility factor attracted a lot of investors even if some of them don't believe on this market.
They are after for the potential profits, and only some of them later on, educate themselves what is this market all about.
But we can say, that most are attracted first by the high profits that they thought they can easily get.