>"By your theory every single exchange is simply careless then right? Every intelligent computer user knows that ALL THINGS get hacked."
I wasn't positing any theory.
The "carelessness" referenced also had nothing to do with being hacked.
Carelessness is misplacing 200,000 bitcoins. Carelessness is not even knowing that 200,000 coins are unaccounted for. Carelessness is hiring quiche and pastry chefs for your cafe instead of hiring security personnel for your exchange.[2]
"Shuttered bitcoin exchange MtGox has found almost 200,000 bitcoins which it believed were lost, according to the company's CEO Mark Karpeles.
The money was sitting in a wallet which the firm thought no longer held bitcoins. However, following the application for civil rehabilitation (a Japanese legal procedure analogous to bankruptcy), "these wallets were rescanned and their balance researched," says Karpeles, and one wallet was found to hold a balance of 199,999.99 bitcoins."[1]
[1] https://www.theguardian.com/technology/2014/mar/21/mtgox-mis...
[2] https://blogs.wsj.com/japanrealtime/2014/05/02/bitcoin-cafe-...