At the end of the day you have to trust someone (Bitwarden, Hoster, Hardware Manufacturer…). It comes down to your threat profile and what you personally accept as a risk vs. effort (or convenience). For me Bitwarden was acceptable, but I switched to self hosting Vaultwarden CA. 3 years ago. Main reasons being the advanced features (sharing some passwords with the family, setting up a tech savvy friend to take over my vault should I get hit by a bus, etc.). I did not have any relevant downtime of that service in years.