I'm a long term investor.
I went in at 250.
Seriously. The market gyrations do not affect me a bit. I'm more or less immune to it by now.
My stop loss is at 240.
The reason it is being battered down recently is because the market got ahead of reality. They expect too much from Google. So right now, they are adjusting their expectations.
After the price has dropped and stabilised, the upward trend should continue, albeit at a more reasonable pace