You don’t know where your files/photos goes the moment you enable that iCloud storage, this is why I’m not into this and I will never enable it because its just a 5gb free space the extra will be charge on your account, and I don’t think its worth the risk. This is a reminder to every Apple users here, stat cautious and stay safe.
People need to be very wary of those services, to begin with even if we assume that such a service was completely invulnerable to hackers, which is not true but lets assume for a moment they are, then you are giving a private company complete access to your private information.
And it is reasonable to think that they never delete anything from their servers so that information is always going to be there, if to this we add they also store data that could compromise your wallets then this is an even bigger reason to not use them, but unfortunately I am sure there are many people that will decide to use them and will lose their coins as a result of a hack.