this is the economics board so the risks that people are talking about here is the risk with the price and the volatility. not the bitcoin or even exchanges security. and this risk about the volatile price will remain with bitcoin as long as it is a small market compared to other things like gold.
This is one of the most common misconceptions that I have met here, i.e. if the Bitcoin market cap grows multifold (and consequently, the price of Bitcoin), it will somehow lead to a greater stability of prices. That's never going to happen...
The last price swings (even without the recent Bitfinex turmoil) only confirm that