Bitcoin is the "real money" itself and what you refer to as real money is not even money, it is fiat "currency". As a reminder the difference between money and currency is that currency is a medium of exchange while money is a currency that is also store of value.

Fiats are currencies because they are not store of value, they are only medium of exchange. And because bitcoin is a medium of exchange with a capped supply, it can be a store of value which makes it money. In fact Bitcoin is the only money in existence because it has both characteristics. Everything else only has one of the two (eg. fiat is only medium of exchange and gold is only store of value).

Bitcoin is the "real money" itself and what you refer to as real money is not even money, it is fiat "currency". As a reminder the difference between money and currency is that currency is a medium of exchange while money is a currency that is also store of value.
Fiats are currencies because they are not store of value, they are only medium of exchange. And because bitcoin is a medium of exchange with a capped supply, it can be a store of value which makes it money.