My opinion of Jack's bitchat is evolving, see
First thought: reticulum > bitchat because radio waves have greater range than bluetooth. But, reticulum (and meshtastic) requires specialized hardware. Few people have or will get this.
Second thought: people already have a bluetooth phone in their hand. So, maybe bitchat > reticulum by sheer power of numbers of devices possible. (It would still need to become stupid-simple and dummy-proof as a UX though.)