Everyone should be looking for a backup strategy that involves at least a hot backup and a cold backup, with some sort of offline validation. However this is easier said than done (because now you've to deal with multiple file systems, decisions about cryptography, lack of interest in creating something that you hope you'll never need, and so on). I wish there was a service (and don't tell me about Backblaze because it's incomplete and doesn't work that well - from my own experience) that would do all these things for you in a reliable and trustworthy way (including giving you snapshots in physical media from time to time - delivering to different addresses, possibly in different jurisdictions, and so on).