Bitcoin price for now almost rise more than $7,000 a piece and it is because of supply and demand, meaning more people wants it so the demand of it rises and when that happened the price of it will rise because the supply of it are only limited as of the moment.

The Bitcoin measurement of it is in '$' so meaning there money that is entering to its market capitalization and '$' is a real currency that is used worldwide so Bitcoin has a real value. If you want you can try to deposit your own Fiat money into Bitcoin then withdraw it back so you can validated it yourself.