The two main coins I'm earning passive income with are COSS and Ark.
COSS is an exchange that gives 50% of the exchange fees as a fee split with token holders. That 50% is divided by the number of tokens and then given out based on how much you own. As volume picks up on the exchange you get more tokens in your fee split as more fees are being generated. This means that if either the value of the token, or the volume on the exchange increases, the amount paid out increases. It's important to note that you get fees on a per token basis - so for each token on the exchange you get the fee split for that token. ETH based tokens can be converted for free - the rest of given out by executing a smart contract. I let mine build up for months at a time to reduce the smart contract fee cutting into profits.
Ark is a favorite of mine because of the 10% staking rewards. Ark is DPOS, delegated proof of stake, which means your wallet doesn't have to be running to earn rewards. You give your vote to 1 of 51 delegates and they pay out, weekly or monthly, your share. My biggest complaint about other proof of stake coins is the wallet is constantly running, eating system resources, so I can earn my stake rewards. Also, if on Windows, those damn updates end up taking the wallet down frequently.
The markets are red with altcoins bleeding the most. Not a bad time to pick up some you think are going to be winners. For me I'm getting some more Ark and COSS.