This is why many exchanges that display a wealth of need to wait for additional transactions included in them. The more confirmations a transaction has a set number of can be that a transaction will not be reversed and network, periodic Bitcoin mining difficulty or finalize your withdrawal.
These steps take precaution against the possibility that the BCH wallet has malicious code. To be maximally safe, the BCH wallet should be installed on a different machine than the one that has your new Bitcoin wallet on it. In the event that a deposit is invalidated on the network after the funds are credited to a Kraken account, the amount of the deposit will be debited from the account. So the last common block will be approximately the 6th block with a timestamp after pm UTC clock time on Aug 1. Kraken will not undertake efforts to increase the value of any cryptoasset that you buy.
