It's confusing, just like all comments above the same as I thought, I never heard of Bitcoin core in the crypto market.  It's only on the Bitcoin transaction, it's a program to use in the Bitcoin blockchain network.  Read further here, https://bitcoin.org/en/bitcoin-core/.

Now in trading, it doesn't mean you earn money trading it's meant for everyone.
Trading isn't meant for everyone, it's only for those who have skills and knowledge of it because it's very highly volatile.
The last part is, trading is not a form of business, when you say business it has a sustainable production income consistently.  But in trading, it seems like gambling that the potential is very difficult to make money consistently.