How is brute-forcing a concern? Your password might be a guessed in a dictionary attack if you have a weak password. Or if at some future date a KeePass specif

How is brute-forcing a concern? Your password might be a guessed in a dictionary attack if you have a weak password. Or if at some future date a KeePass specific vulnerability is discovered, someone might be able to use that. But someone trying to brute-force your password isn't a problem anyone needs to worry about. To my mind, the real downside to using dropbox to store encrypted stuff is that the existence of the encrypted stuff is not a secret. And recently it seems the spooks look upon encryption with ever increasing suspicion.