On my last post, it was trading for around $600, and I was replying to someone who had been thinking about buying some when it was at $300 and wanted nothing to do with the high $600 price. It never went below that, unlike what most of us figured, and skyrocketed to over $1200. Now that it's somewhere around $550ish, it's down to less than half of what it was recently. I am guessing lots of people were, and still are interested in it, and will be waiting a bit to see when it bottoms out, then will buy when it looks more reasonable. What is "reasonable" is constantly changing, but it's all perception. I am guessing the guy earlier who thought $600 was outrageous is reconsidering it's current $550 price as a lot more reasonable...
I guess the point is that everyone knows (or should know) it is a volatile commodity right now - like I said before, if you're trying to time the bitcoin market and make a quick buck... good luck. Flip a coin, and those are probably your chances of success. Everyone knew when it was over $1200 that it was in a bubble of sorts, and that it would come crashing down at some point. We just didn't know how high it would go before that happened. That's what it's done for a long time now - nobody should be surprised by that. Despite the China news, it will continue to build, then correct, then build, then correct, just like any commodity that continually gains popularity - until it evens out into a mature market. It will be a long time before it is in any way considered mature... so until then, hold onto your hats and enjoy the ride.
Buy for the long term, and buy to support the cause. The learning experience, alone, will be worth it.