The other point is that it's easy to be optimistic and constructive when the bitcoin price is trending to new highs and also easy to be pessimistic and detracting when the bitcoin price is lower and moving sideways.
Add this to the financial and psychological impact of MtGox and couple it with a continuing long string of failed bitcoin exchanges, wallets and investments which rob individual investors of their coins against the backdrop of difficult regulation challenges for bitcoin to surmount and it's a fair bet that most of the detractors are just jaded and succumbing to a form of negative community groupthink.
They'll brighten up when the bitcoin price rises and the noobs and diehards start hollering, "Too the Moon!!!!!!"
