There are research where they've done short haul (~1km i think) neutrino comms at about 0.1bit/s. Slow but still cool, and yes if you could get high enough bit

There are research where they've done short haul (~1km i think) neutrino comms at about 0.1bit/s. Slow but still cool, and yes if you could get high enough bitrate for less money than you could gain in HFT trade, it would probably already exist. Them HFT guys and girls do rather crazy stuff to get their nanosecond advantages.