17 Million ($170 Million) Stolen from Bitgrail. This was one of my most profitable coins last year and had it on Bitgrail. I sold it at around the first of the year because it looked topped out. Thank goodness I did. I have yet to lose coins on an exchange but this was a close one.
https://cointelegraph.com/news/bitgrail-exchange-asks-devs-of-stolen-coin-to-alter-ledger-to-cover-losses
https://cointelegraph.com/news/bitgrail-exchange-asks-devs-of-stolen-coin-to-alter-ledger-to-cover-losses