Why not invest that money to the actual stock market instead. Even if bit coin were one day to become legit with regulations and all that stuff, its too scary to go head first into that right now. Like that guy who supposedly lost 300k + because Mt. Gox went down... kidding or not, I would not doubt some folks have lost a considerable amount of money due to investing into this currency. Why not just gamble with the stock market instead with actual currencies? Or am I missing something here?
If you take proper precautions it's difficult to lose your money. Anyone who wired 300k to MtGox in the last few months didn't do their research. Or greed drove them to do it - they saw the lower price of Bitcoin on Gox, and thought they'd actually get coins at that price. I think that definitely applies to some speculators. I don't worry about losing my holdings because I keep majority of them in cold storage, on a machine disconnected from the internet. I keep a separate wallet for coins I can afford to lose or plan to spend.
At any rate we're still in the early days, I don't think Bitcoin is ready for the mainstream yet. It will be made a lot easier to use, there will be more reputable exchanges. By then, the price will likely be much higher as well. High risk high reward.