Based on a blog post from Jameson Lopp I have made small memory cards for your next BTC meetup — not your keys not your coins...

https://blog.casa.io/securing-bitcoins-scarcity/

Entity: Bitcoinica

BTC Lost: 61,000

Year: 2012

Attack Method: Wallet Stolen

Entity: Bitfloor

BTC Lost: 24,000

Year: 2012

Attack Method: Private Key Leakage

Entity: MTGOX

BTC Lost: 650,000

Year: 2014

Attack Method: Wallet Stolen

Entity: Cryptsy

BTC Lost: 10,000

Year: 2016

Attack Method: Trojan Malware

Entity: Bitstamp

BTC Lost: 19,000

Year: 2015

Attack Method: Phishing Attack

Entity: BTC-e

BTC Lost: 66,000

Year: 2017

Attack Method: unknown — check block 477,472

Entity: Bitfinex

BTC Lost: 120,000

Year: 2016

Attack Method: Wallet Stolen

Entity: QuadrigaCX

BTC Lost: 10,000

Year: 2018

Attack Method: Founder and CEO suddenly died

Entity: Fcoin

BTC Lost: 10,000

Year: 2018

Attack Method: Scam

Entity: Celsius

BTC Lost: 105,000

Year: 2022

Attack Method: Information Leakage

Entity: BlockFi

BTC Lost: 30,000

Year: 2022

Attack Method: Information Leakage

Entity: FTX

BTC Lost: 70,000

Year: 2022

Attack Method: Scam