Bitcoin fascinates me personally, but I prefer the other options - digital gold. These have a real asset backing with real precious metals in storage with your name on them.
Honestly I don't think I am smart enough to understand the complexity of bitcoin.
I do agree these will cause massive disruptions worldwide. The reality is that this has been going on for quite a while now, just under the radar. Companies like Pecunix and GoldMoney have been at this for over a decade.
The internet has created a potential for completely unregulated commerce and companies like this are filling the need of 'money' for exchange of goods and services.