The last time we wrote about Bitcoin, in October, the currency’s future looked grim. A series of security incidents had created an avalanche of bad press, which in turn undermined public confidence in the currency. Its value fell by more than 90 percent against the dollar.

We thought Bitcoin’s value would continue to collapse, but so far that hasn’t happened. Instead, after hitting a low of $2, it rose back above $3 in early December, and on Monday it rose above $4 for the first time in two months. It’s impossible to predict where the currency will go next, but at a minimum it looks like the currency will still be around in 2012.