I am not sure if “Gazillion” is a word, but this antenna war article is quite interesting. Read it if you care to gain perspective on how important locating a few hundred feet closer to an exchange is to increasing trading profits.
-Dr. Moore
The Gazillion-Dollar Standoff Over Two High-Frequency Trading Towers
https://www.bloomberg.com/news/features/2019-03-08/the-gazillion-dollar-standoff-over-two-high-frequency-trading-towers
Now we know who’s causing the next flash crash.