There are risks either way. There have been plenty of vulnerabilities in popular password managers (some that also apply to this blockchain model). But I think

There are risks either way. There have been plenty of vulnerabilities in popular password managers (some that also apply to this blockchain model). But I think your AES encrypted password being publically visible is a pretty low risk, compared to a PW manager being breached, having a flaw in the client, their being coerced by government, etc