Thanks Onceuponatime, I download it and I'm reading it. It seem like a great introduction to this world and a good answer to my quesion.
I defenitively look at it as a long terme investment. You may be right Carppet ride.
I'm also a professionnal poker player. I can't remain without bitcoin because I'm actually playing 5 to 10% of my hands in Bitcoin.
Unless I was until Seals with Clubs (the biggest bitcoin room) shut down ...