The future of paper money is not so good but for the bitcoin it is good, paper money will be destroyed in the future, because everything is gonna be digital by some day.
I think its just a matter of time before it will disappear forever.
It will never disappear dude, just think of the poor people who are not aware about the digital world, can you expect that they will use bitcoins and not paper money? They will use what is easy for them.