You can think of Bitcoin kind of like a foreign currency, which can be bought with or exchanged for other currencies; or be used to pay for goods or services, trade, invest, and more.
Second, we recommend signing up for a ProtonMail account to make your account as anonymous as possible.
Instead of requiring a centralized authority or middleman, like a bank, to make transactions, it instead relies on peer-to-peer technology, much like BitTorrent or even Skype.