At this stage paper money is more convenient in purchasing physical goods as there are no merchants available that accepts bitcoins and even in future there will be certain percentage of people who will prefer to use paper money.
Well the future of money is going to be gone, because if we are talking about the future. The future is going to be paper less government or cashless society, because the people wants to have transactions that are going to be convenient to them. And that is going to be the answer for their problem.
So, maybe we are going to say good bye to paper money in the future.