It "feels" like an insider attack (simultaneous compromise of lots of high value accounts) but I agree, it will make for a fascinating post mortem if one is produced.
From - https://www.vice.com/en_us/article/jgxd3d/twitter-insider-ac...
Maybe we'll get a leetcode question out of it, how much should you risk your career for after taking a job at a FAANG?
Given that most FANGers are obsessed with cash, I'm pretty sure they'd say "yes" to risking their career for some sweet BTC.