Passive income coins essentially fall under the Howey Test and as such most people tend to avoid creating those unless they manage to justify the passive income as "passive-aggressive" like in the PoS system where the person is "staking" his coins and thus is actively participating in the income he gets. A passive income coin would be
WeBetCrypto which is currently in ICO. Since it's in ICO stage until they show any actual proof of progress I would advise against investing but from the looks of it, it looks like a decent project.