A day ago I was thinking if bitcoin is a currency or a technology since it's a tech stock.  Now, for the uninitiated, Bitcoin is supposed to be the online currency that will free us from state-backed ones. It's a cryptographically-sophisticated virtual currency you can use to buy real things over peer-to-peer networks without leaving a trace in the real world. The idea is to create money that central banks can't debase and governments can't tax. In other words, digital gold. Actually, make that anonymous digital gold.