It's hard to predict what the future will be for the paper money, but I don't think it will disappear very soon, because it's still used by many people.
But you can see that Bitcoin is getting more popular and used, and that's a good sign.
it is really easy to predict the future to be honest, in my opinion they will disappear and i think people will use only bitcoins
Ha ha. That is pretty optimistic. Governments won't take any challenge to their authority lying down.
Plus you have many more innovative alts. One of them could turn out to be a bitcoin-killer.