2. When you are gambling, one thing you consider is your anonymity, and with bitcoin, you can play no matter who you are, with you identity isn't at risk.
This thing makes crypto currency gambling riky so watch out for players you think are rigging the play.
3. Games from cryptocurrencies are probably fair, you can guarantee that you can win with a 50/50 chance.
I don't think it guarantee fairness, you can rig the program or the codes based on you liking so it isn't really that fair.
What I can say that is a big difference is that you can do gamblin online thru the comfort of your home and no need to go to the casino.