If a miner gets hacked, then their blocks will go to the attacker, or they won&#x27;t be mining.  Blocks will be mined more slowly and transactions may take longer for the same number of confirmations until the miner comes back.  If a bank gets hacked, people steal money enormous amounts of money by directly changing their ledgers.  I don&#x27;t see this as some sort of a loss for cryptocurrencies.<p>I&#x27;m not sure what you mean by turnover although you might want to learn more about bitcoin before you rail so hard against it.