As for Bitcoin being safe, read up on Mt. Gox, and note the 'around 850,000 bitcoins missing' part. Sounds like around 200,000 were eventually found.
Originally Posted by tron
In the Mt. Gox case, it doesn't appear that there was any insecurity in the bitcoin protocol. People transferred their bitcoins to the Mt. Gox exchange and they got stolen from there. It's like putting your gold coins in a bank vault and having them stolen by bank employees or a break in.
It turned out that Mt. Gox wasn't a well run organization. Instead of being the "First national bank of bitcoin," it was more like "Billy Bob's lawn care and bitcoin exchange."
If you put your bitcoins in an exchange, they're vulnerable to security problems or insider theft at the exchange. If you keep them on your own computer, they can be stolen if your computer is hacked.
There's also the possibility that someone will break the math behind the bitcoin protocol or even that there's a "backdoor" built in to it.
To my mind, the biggest risk is that everyone will simply decide bitcoin is no longer the thing and the price will drop suddenly. Think of the Dutch tulip bulb bubble or Enron stock.
Don't get me wrong, I'm not a big fan of bitcoin. However, it's neither as good or bad as the hype on either side.
It's useful for some things, but not necessarily safe, especially if you don't know what you're doing. Don't put anything into bitcoin that you can't afford to lose.
If you're putting your monthly hooker fund money into bitcoin, the biggest thing you risk is no pussy for a month.