The bitcoin market has always been unstable and anyone who tracks mtgox for more than two days (and often even those who track it for less) knows this. While a part of me wishes I had put more into it at $0.70, it is definitely not any kind of stable investment. If you're into btc to invest, you should be really, really careful to place only a small portion of your money into it; while you may get lucky and hit a 3000% increase, I wouldn't count on things to stay that way for any reasonable time period; as below, just one big btc holder selling off can drop the price of the market hugely, as supposedly happened this weekend. Take into account btc's prospects for government disruption/poisoning/etc and it is definitely a very unsafe place for any significant amount of money.
