I'd trust it more on my own computer than on any of the bitcoin exchanges. There have been a number of pretty giant security and backup lapses, and they haven't been around long enough for me to trust any of their reputations.
My own computer on the other hand, is pretty definitely secure. And I can encrypt the wallet if I'm extra paranoid.
This doesn't really extend to your average computer user, and I don't think BTC will take off in any meaningful sense until we have a user friendly and secure architecture for it. But the current state of being a currency for the tech-savvy isn't necessarily a bad thing.
My own computer on the other hand, is pretty definitely secure. And I can encrypt the wallet if I'm extra paranoid.
This doesn't really extend to your average computer user, and I don't think BTC will take off in any meaningful sense until we have a user friendly and secure architecture for it. But the current state of being a currency for the tech-savvy isn't necessarily a bad thing.