Bitcoin and real money is both currencies but they are different in platform.Bitcoin is a crytocurrency used mostly in digital world and real money is a fiat a physical money
Bitcoins are not just money, but it has got an additional feature like considered as an investment also because its prices are more volatile compared to other currencies in the world. So you can make a good profit by investing in bitcoins. Also in some stores, you will get additional discounts for using bitcoins as payments.
The investment thins it correct,but also BTC gives you so much more than that.It gives you freedom,you don't have to go through banks,third parties and so on,you also don't have to wait severeal days for confirmations and so on.The fees are little to no existend and this whole thing makes BTC so much better and gives an opportuinity which there was never before and that's what so great about it.