http://dnbible7sqskwppgaqohboxz7u5kzffjzdx3lxzpjtt3s6tzeiytb5ad.onion/bible/communication-methods/bitmessage/index.html
This means that the core python team is no longer actively developing it, bugs or holes could eventually be found in python2 that might put risk on Bitmessage, make sure anything sensitive you still use PGP. What is Bitmessage?