Currency speculators don't give a damn about trust. They're not in it for the long term value that derives from the usefulness of Bitcoin, and that's the only thing you need trust for. They'll cash out when the price gets to a point where they're happy with their return. At that point either new speculators will get on board and keep the price high or the price will fall back to real value of Bitcoin.

Neither really changes the usefulness of Bitcoin or it's long term value as a currency.