What is ur position now?

Say if current position not even a manyzer and someone offering u CEO post u better beware treated as scapegoat later.

If everything sounds legit im sure that person thinks u are capable so go for it.

Does this mean you won't be moving to Australia anytime soon?

In short, yes. Expectation is high.

Some more the person is founder & owner. It is expected the new person shall bring the company to a new height.

Then, will you try to renew your PR when it expires? Seems like such a waste bro...

Oh I see. Thanks for clarifying. Good luck with the new job bro!

It's an interview or position had been offered to you?

There's no need to glorify the boss. Even if he's head of Fortune 500 company or has 5,000 staffs under his belt, he's still just another human being that needs to eat, sleep and rest. Take away someone's money, title and fame - where does that leave him?

His achievement is great, but personally whether someone impresses me it would be his/ her capability of a far vision, to mentor, lead, groom his subordinates.

IF you had been offered the position, ask yourself the ultimate question of whether you'll do anything to stay on the job (ie. fast pace learning, capability to catch up etc). 
I think you misunderstood her context.

Big companies have secrets. Even bigger companies have bigger secrets. So she meant that if you're someone NOT from the industry/ background, nor remotely qualified for the job but was offered this silver platter all of a sudden, just be careful that it might not be what it seems. Don't assume only unknown/ small companies do the dodgy stuffs by the way. Well known or not isn't the issue here.

View this offer through a neutral lens and see if its reasonable for them to hire you with your background and experience. If something feels off, don't ignore the red flags. Just saying.