Bitcoin is a decentralized digital currency and because of its nature no institutions or entities can control or manipulate its existence. It is highly volatile so price value varies from time to time. On the other hand real money is centralized so a financial institution control it and its production is based on the gold reserved of a particular government. It  also has a fixed value.Bitcoin is a digital currency which means it has no physical form so can only be used if connected in the internet while real money has physical form.