It's an extremely odd decision by the author to publish this piece. Port attacks on cryptocurrency accounts is nothing new, and outside of publishing the number ($100k!) there is nothing special about this account of events vs the countless other near identical articles that have been published on Medium on the same old attack.
The reason I say it's odd is that he's an engineering manager at BitGo, which is a leading cryptocurrency custody solution! His job is literally to secure and protect institutional cryptocurrency wallets, and to publicly tell the world how careless he was with his own personal account looks extremely poorly on his employer despite the fact that this was an unrelated incident.