This is what gold used to be used for. But gold is not liquid, and Bitcoin is. It appears that hackers have made something better than gold, the longest standing store of value in human history. What an incredible achievement! For the first time in history, I can somewhat safely make the argument that we now live in a post-gold economy. Gold is still there, but we now have something even better for storing value.
This is getting deep into the economics of mediums of exchange, which are important for understanding what is going on here.
I did a talk on Bitcoin a while ago where I went into describing Bitcoin from a medium of exchange perspective rather than a technology one. It may help you to understand what is going on here, and why I think that this will continue into the future: http://www.slideshare.net/KyleDrake/bitcoin-the-cyberpunk-cr...