Elon Musk's estimated $1.2 trillion net worth now surpasses the GDP of his native South Africa and the annual output of most countries.

Elon Musk's estimated $1.2 trillion net worth now surpasses the GDP of his native South Africa and the annual output of most countries.

Musk's net worth has dropped from a peak of $1.32 trillion to $1.08 trillion at the time of writing, per the Bloomberg Billionaires Index. The drop—between June 16 and a week…