>>12772734There is not much point, the only advantage is that you can beam them straight trough the earth at light speed which might reduce communication time by a tiny amount. The downsides on the other hand are considerable, the equipment you need is both massive and expensive meaning you can only really use it to communicate between 2 fixed targets and even if you could magically make a receiver that isn't the size of a building you still need to know the precise location of the target if you want to keep the beam tight and ultimately the speed advantage isn't great (even if you have to bounce your messages trough GEO to reach someone on the other side of the world you are only looking at like 15 times the path length which at light speed is barely nothing. As for security you could just use satellite laser tight beams or simply encrypting the message (with modern encryption you are way past the point where hacks against the human operator are the easiest point of entry anyways)
Communicating with neutrinos is more of a scientific curiosity relating to neutrino emission and detection technology (e.g shooting neutrinos at your own detectors makes figuring out best detection methods easier) not an actual practical research application.
The closest practical application would probably be stealth messages to subs but even that is kinda pointless for the reasons stated above.
