Cryptomator is good but it's important also to keep backups of the unencrypted content of the Cryptomator vault that are not encrypted by Cryptomator. (You could encrypt the backups with another system.) Cryptomator vaults are more fragile than the underlying file system, and it's easier for a glitch in the sync process to corrupt them so they're unrecoverable. I have lost data due to this in the past. So it's best to make sure all the contents of your vaults also exist somewhere else, encrypted in another way.
Also: encrypt everything you upload to the cloud with Cryptomator or something like that. I amazes me I used to put stuff directly in my pCloud folder.
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