How much of the decrease from $30 is due to scams, hacks, etc.? It strikes me that most of the price decreases are because of these, not people losing faith in bitcoin's concept itself.
Would you refrain from buying a commodity... say gold from which you believe that it will be worth much more tomorrow just because a bank in your area has recently been robbed? I guess not
Its just a depressive phase which will end sooner or later. The "fundamentals" of the project have not changed at all