https://www.youtube.com/watch?v=_ZDEWVJan0s
I have some questions about it and would love to hear your comments just as fun.
If one guy could be the reason for the crash. How screwed is or was the system?
They say he just turned off his computer, maybe lost internet connection and that triggered it.

Why his orders were not seen as suspicious in the first place?
If he would stop after let's say 20m, would he get away with it?
Why the FBI can arrest someone in UK? He should have moved to Russia. Maybe now he can and and do it again.
At the end they let him go? He was the reason for millions of people losing jobs maybe life, businesses close, economic disasters.
Cheers