If I had money in bitcoin I'd find this movement terrifying. It is not correlated with broader economic movements or the inflation rate of USD, and has all the classic hallmarks of a bubble, including true believers telling everyone it is different this time, increasingly wild oscillations, and exponential growth.
I find bitcoin really interesting, love the idea of a cryptocurrency, and also find the idea of a deflationary currency interesting. I've no argument with that side of it. Obviously there are issues with things like exchanges which seem to be almost entirely run by amateurs who think that a VPS or leased server is secure enough for financial transactions, but those problems could go away in time, they are not inherent to the currency, though they're another reason to be cautious at present.
However there are a few issues with the use of the currency which can't easily be fixed. What I find more troubling is the commitment to anonymity and lack of accountability from the creators - it is designed to allow anonymous transactions, and the users seem to be resistant to regulation. Those two things mean people can engage in bitcoin theft, fraud, laundering, cornering the market, setting up bogus or insecure exchanges/banks, with impunity and anonymity. Without proper regulation, insurance, compensation, which means identification of users and verification of transactions and everything that goes with that, I can't see bitcoin spreading beyond enthusiasts.
I wouldn't use it for anything important because of the lack of regulation and controls, but do think it represents something of the future of currencies, after our latest experiment in hyper-inflationary fiat runs its course (see Fiat Money Inflation in France for a previous experiment). It'll be interesting to see if other cryptocurrencies are born which take a different direction and attempt to build in accountability and responsibility to secure transactions and allow them to be policed effectively by tying them to real world identity. Anyone know of any?