~snip~
If the price drops drastically, I think I could need a few bitcoins since I still have money to buy them. It was a joyous moment for many people who didn't have much money because they could buy more bitcoins at very low prices. But I think it's unlikely that the price of bitcoin will drop drastically unless a lot of investors lose faith in bitcoin and a lot of whales sell their bitcoins, causing the price to drop very quickly. But even if the whales will dump the bitcoins, I don't think the price will drop that drastically because it takes a lot of bitcoins to force the price down to that level.
Price manipulation can be done by big players.
The problem with this is that it's not a long term strategy. Sure, they sold lots of bitcoin and lowered the price, but then lots of people kept buying and the price eventually will go back up, and the big players eventually will run out of Bitcoin to sell.
The key thing is that there's a finite number of Bitcoins out there, and they cannot lower the price indefinitely because there's more and more people joining in that also want to participate in Bitcoin.
A price of $1000, which I don't even think is possible, can only happen in the short term. Long term the price will go up.
To answer the question, I would continue buying more Bitcoin at that price.