A+++++ advice from analyst Hyro-Sama.Sony will bounce back. Buy now while it's cheap.
I would call it a gamble... Not that stocks are not always a gamble but my opinion of Sony right now is a little more risky than normal. They have been selling off assets and have had their credit rating reduced a couple of times and are reporting huge losses for the past 4 years running. If Sony could make some sort of comeback in a big market be it TV's or Music or Movies or Video Games an investment right now could pay off pretty big down the line, but I would hold off a little while longer as I doubt that this is the bottom of the price curve.
Best time to invest, right before they announce the PS4 there will be a jump in stock price for like 3 days. Sell at that point as it will nose dive after the excitement wears off.
Edit: First chunk of text is for long term investors the second is more for day trades.