According to wikipedia, the global FX market alone accounts for $5.09 trillion dollars per day in transactions [0] in 2016. Global GDP clocked in at $75.4 trillion U.S. dollars in 2016 [1]. The FX market alone accounts for two orders of magnitude more transfers of value than global GDP...I'm sure if we started including stocks, futures, options, etc. the number would be even higher.

[0] https://en.wikipedia.org/wiki/Foreign_exchange_market

[1] https://www.statista.com/statistics/268750/global-gross-dome...