I wouldn't do anything when the price hits $1,000. I do have a plan for what I'd do with my coins if the price ever reaches stratospheric levels but they involve amounts much larger than a couple of grand. Other posters have mentioned that many people by now have probably become disillusioned with Bitcoin because of the continuing fall in prices and perhaps some of those people might have lost faith in it but that doesn't change the fact that Bitcoin is an exciting and revolutionary technology. The potential upside is huge and because of this, I don't think I'd want to risk selling even 1/2 of my coins even if it means that I might miss out on the opportunity to scoop them back up for a cheaper price later on.
My ultimate plan is to sell 1/3 of my stash once BTC is enough to buy me a decent house ($50,000-$100,000 should do it). The other 1/3 will only be sold once the BTC price is worth ~$500,000-$1,000,000 which should be enough for me to retire on. The last remaining 1/3 will be hodled forever.
(I also have a small amount of BTC kept separately from the rest of my savings which I might use for occasional purchases, etc. but the bulk of my stash is kept as savings.)
I will sell all of my bitcoins and wait till when the prices again goes down may be around $100 or $200 so i can get back into business again. But if it hits $1000 would sell it off and enjoy the profit by investing some where else where less investment is required.
Why would the price drop down to $100-200 after rising to over $1,000? I mean, sure it happened once in the past but that's no guarantee that the exact same thing will happen again if Bitcoin decides to spike. When the price spiked from $13 to $265 in early 2013, it never once again reached the low double digits. Someone who sold all their coins during the peak and waited for the price to go back down to $13 would have had no bitcoins by the time the price jumped up to $1,200 in November.