I'm not sure I understood correctly. Could you elaborate?

Wouldn't selling created bitcoin lower the price of bitcoin at your exchange? A lower price would attract USD and the exchange would leak BTC with people doing arbitrage.

Then if you claim a hack wouldn't you have to show that value moved to the hackers wallets and that value and the value you retain had to add up to the total value received in BTC? And if the "stolen" amount of BTC couldn't be shown to be in another wallet, wouldn't the fraud be discovered?