"it would not surprise me if bitcoin, or some other digital currency" This is what makes me pessimistic about Bitcoin as long term value store. If a new digita

"it would not surprise me if bitcoin, or some other digital currency" This is what makes me pessimistic about Bitcoin as long term value store. If a new digital currency that was a significant improvement on Bitcoin was developed (a Bitcoin v2, if you like), I'd expect most of the money to shift over to the new currency eventually. The fact that there is a lot of infrastructure for Bitcoin built already would mean Bitcoin would continue to be used for sometime, but its value would drop dramatically if people see the new currency as the future of digital currencies. (Tip: if you want to do this, you need to make big technical improvements, not just tweaking Bitcoin like Litecoin and all the others do, and you need to do a big marketing effort to make people believe in it.)