Difference between bitcoin and real money for me is confirmation process as its today. Real money doesnt have this. However, bitcoin always superior and we can make choice to invest.
Real money doesn't have confirmation process or time because you can simply it with an instant for whomever you are transacting. And real money can be spend everywhere because it's the universal medium or currency. Bitcoin is still not yet accepted by most of the society and countries so that's a big difference.