I dont think the Euro will cease to be traded as a currency for a long time, at least in some countries of the EU.
I also dont think bitcoin will cease to be traded, but it may loose much value in the long run and in market crashes for a number of reasons the Euro is safe from experiencing, like being declared illegal in some jurisdictions, having to fade besides a better alternative (bitcoin 2.0?), being hacked all the time (ok bitcoin has not been hacked as a scource code, but it is still thinkable, while the Euro cannot be hacked in any way. How do you want to hack a bill?).
To summarize my unrequested thoughts: Euro kind of save, BTC a fucking rollercoaster ride with some parts of the track missing.
Lets go rollercoaster!
You're right you can't hack a system that's already been hacked, no wait it was a hacked from the moment of it's inception? Or can you? Wait yes you can it's called printing as much of it as you want or forgery or fractional reserve banking or..
http://vimeo.com/2244372
I'm confused