@sprstpd
Look, I don't know how I can make it any more simple !
A "natural person" is just that ! Its a human being, its got a heart, lungs and all the rest of the things a "natural person" has.
Dress it up however you like, but a "sole proprietorship" is a business, it is NOT a "natural person". It may not be a full blown "legal entity" but it is not a "natural person", it is a form of business organisation !
Anyway, coming back to the original question at the top of this thread, the OP said quite clearly that they were thinking about "incorporating", and that very much is not a "natural person".
I understand that, but you can be an individual trader and never "incorporate" (i.e., there was no definitive action that you took to become an entity), yet because of the frequency of your trading you qualify for "tax trader status." This entitles you to write off business expenses on Schedule C under your own personal name (as a sole proprietor). Is this purely a tax classification? Or does this affect the profession/non-professional classification as well? The individual trader is clearly an individual and is a natural person.