You’re probably not worth individually attacking, but a brief look at the failed ssh login logs of any insignificant server shows that you probably are worth automated attacks… so I suppose the question is “Are you more vulnerable due to a) the risk of getting pwnt by an automated attack (due to a misconfiguration or being even a little slow to install a critical patch) or b) due to the risk of bitwarden getting pwnt by a sophisticated targeted actor?”
Further complicating this math is the E2EE nature of it, so it’s not just enough to pwn a server, you’d need to also compromise the client application.
Actually, now that I think about it, if you can compromise the client you don’t even need to compromise the server. I’m not really sure under what scenarios running your own server would protect you in in that case.