The combined wealth of all people in the world is $241,000,000,000,000 or $241 Trillion.
The median human on earth worths $4,000.
Which mean that half of all adults on earth have less than $4,000 to their name.
The average American net worth is $44,911.
More interesting facts:
http://waitbutwhy.com/2014/03/combined-wealth-world.html