Merchants who accept Bitcoin are actually advised to wait for six more blocks to be mined after the transaction goes through to minimize the risk of fraud.[222] (Remember that an attacker with enough computing power could make a new chain and try to out-mine the main chain. The hope is that, once the main chain has mined six blocks, the attacker’s chain will have fallen behind.) So the average processing time for a Bitcoin transaction can be up to an hour in even the best of circumstances!
