where can i buy real gold?

I just want to thank all of you who replied to my first post. I'm thinking to buy gold through Perth Mint as unallocated.

If I'm wrong, please correct the following:
1. Last depression government confiscated gold from people who hold gold in Australia, and
2. In the US, gold trading was banned.

I am buying gold if in case the dollar collapses. If that's the case, the above things can happen. If I buy gold deposited at Perth mint then it is very easy for authorities to confiscate it. If depressions arrive due to the dollar collapse.

I'm not saying the dolllar is going to collapse or the government going to confiscate gold in the future, I just want to verify what has happened in the past so I can guess that sort of thing can repeat itself in the future. Everybody's opinion is welcome and respected.