would just like to point out that bitcoin is fairing much worse than the currencies of Russia, Iceland, Greece, or Argentina, so not necessarily a great primary currency
You have to specify a timeframe when you claim this. For example, Bitcoin has been quite stable for the YTD. (Well, at least as far as Bitcoin goes.)
It had a huge spike of worth that was total bubble and it has deflated from it. It is still up dramatically from when I started buying them at $5 each.
I disagree that speculators have any role in discovery of true value - on the contrary, they mask true value and ensure our markets are inefficient, panicky, and volatile.
The only benefit I can see is there is an overall increase in liquidity but the cost of that liquidity is quite high.