What if real-time market movements could change a multiplayer battlefield?

I'm building Battle Market Wars, a multiplayer FPS where real-time financial market data can influence gameplay.

The idea is simple:

Real-world market movement → changing game conditions → player decisions.

I'm curious about the concept itself, even beyond my game:

Would real-time external data make a multiplayer game more interesting, or would it become distracting?

What kind of real-world data would you actually want to see turned into a gameplay mechanic?