Bitcoin's real name is satoshi nakamoto. But it is called Bitcoin because there was proof of work money and it is recorded on paper it was one coin of gold. That's why its called Bitcoin
Everyone is free to think why it is called Bitcoin, but who knows the real reason why it is called Bitcoin is Satoshi Nakamoto as the creator of Bitcoin.
Unfortunately Satoshi Nakamoto disappeared without leaving a trace, so we don't know the secret of choosing the name Bitcoin. But that's not
important for us to know, whatever it's called, as long as Bitcoin provides benefits to many people, that's the most important thing.