You do not want to...

You don't want to have it, but when you have it you don't want to lose it. What is it?

You can get the answer if you click the link inside the video.
 
My videos can be found on YouTube. The riddles are inside my videos. I upload videos with this username: IhaveBIGplan
Play free online games or make money from your flash games - link
Site created with: link | link 2