A man is a man, a man is also a person, a human, an animal, a living organism. Things can be more than one thing.
Money is money, and it's also a commodity. I know this is getting complicated but try not to over-simply things so that it fits into your narrative that bitcoin is "only money".
And to be completely honest as of today bitcoin is pretty shitty money. That will, hopefully, change with time. But as of right now it sucks as money.
Money is an asset (read commodity) that serves the following purposes:
1. store of value
2. medium of exchange
3. unit of account
Bitcoin is a poor medium of exchange because only a tiny fraction of people will trade with it. And bitcoin is a terrible unit of account because it's purchasing power varies wildly by the hour making it inappropriate to use for accounting, at least for now.
In any society "money" is the asset that exists within that society which has the best mix of the following properties:
1. portability
2. fungibility
3. durability
4. verifyability
5. divisbility
6. scarcity
Bitcoin is the best mix of those properties. This is why I believe that over time it will become the defacto "money" for the world. But money must be a commodity before it can become money.
Hopefully this helps you understand better the relationship of these concepts to each other.