I have found Bitcoin few months back. Bitcoin is a currency. It's convert to real money.If we wanna use it like buy something real thinks then it's need to convert to real money. Here the main difference between bitcoin&real money.
Now you do not need convert Bitcoin to fiat money because bitcoin is acceptable in some countries like as fiat in local shop and profitable for you if you keep your money in bitcoin.
It never guarantees, when you say profit then one side there are opportunities to lose. Although user bitcoin on the rise, but it will never replace a fiat money. and in my country have not many know bitcoin.