The market cap would be 60 119 863 199 878. That is 60 trillion, if I am not mistaken.
According to this article, all fiat in the world is around 80 trillion, but there is 1.2 quadrillion invested in derivatives alone:
https://www.marketwatch.com/story/this-is-how-much-money-exists-in-the-entire-world-in-one-chart-2015-12-18