It doesn't matter if the vast majority of it is in the hands of opencoin, it's the same effect with BTC/LTC/Whatevercoin and early miners.

And since it is truly deflationary it will replace BTC as a speculative asset.
Added to this is it is professionally implemented, fully accessible in the web-browser. That goes a long way in our times.

And most importantly it's gonna stay valuable even when Bitcoin plunges to irrelevancy since it neither based on it's source code nor a 'coin' as such.