well in my opinion that was a perfect time to buy bitcoin and hold it with that price it will be atleast a times 3 of your investment that you can earn, maybe mt gox has a big affect about the price downtrend.
I do not think that price is appropriate for investment. If the Bitcoin price drops to $ 1,000, then all investors and whales will retreat from the crypto market. And that is also the end of the world the cryptocurrency