Anything you have “in the cloud” is no longer private information. Bank on it.
That is true. But you will not lose that data.
Neither is whatever you have on your computer cloud or no cloud.
It is if you've stored it with Apple's iCloud. You encrypt it to 256 bit AES standard with your own key which is entangled with your device's 128 bit UUID. Apple does not have your key and cannot decipher your data and on receipt of it, anonymizes, splits it into four parts, combines it with other users according to an algorithm and then encrypts it again to an additional 256 bit AES for which they do have the key. It is safe from any prying eyes of government or anyone else. Without your key, entered from your device, no one can access your data.
To break your key assuming a 16 character passcode, it would take a super computer capable of checking 100,000 possible combinations of 140 character keys, seeing if they result in a reasonable result, and then moving on to the next possible key, only . . .
49,281,214,751,401,700,000,000,000,000,000,000,000 YEARS That's 49 undecillion years to try all of the possible pass keys.
Any potential cracker might get lucky and hit the right one in a week. . . but the odds are against them. In actual fact, is that by the time they would hit it, the Universe would have died a heat death, since the half life of a proton is far shorter than that. i think the need to see what is in your data would be moot long before they could break in.