Most business ventures are a risk. In short, I would even say ALL. It is commonly said that the higher the risk, the greater the reward. Although, Bitcoin wasn't created to emulate some sort of business pattern, it has literally been accepted as that. So, it is only logical that it should involve some level of risk too. Oh, yeah, there's financial risk in putting your money behind a relatively new technology. But it doesn't exceed that. There isn't any other form of risk I perceive in dealing with Bitcoins. Except of course if it's been banned in your country.