You don’t even mention how much data you’re talking about.
Data Hoarder
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
Keep your data with multiple different cloud storage companies. As for bitwarden, I'd use at least 3 different providers and try to keep them in sync manually. If one ever goes bust then you always have the other as backup.
All the major NAS brands have a google cloud sync (synology/QNAP/asusstor/casaos)
Owncloud/Nextcloud have a google drive sync plugin
You could use something like rsync to copy to another cloud or drive.