Fee-split/PoS coins are cheap again. Which ones are the best buys for passive income?

With bitcoin steady at 10,000 or so, many altcoins are now bottoming out. The biggest drops seemed to come from fee-split coins and PoS coins, which means it's time to buy again. I hate selling my crypto holdings and so I'm looking to make some passive income with these types of coins. Here's what I've found after researching:

Cryptopia Fee Shares (CEFS) - This one seems like the best choice for passive income based on my research. There are a fixed 6300 coins in existence and the price is $1900 per coin, meaning the market cap is only 12 million USD - yet Cryptopia's volume is on par with Kucoin's and way higher than COSS's. My theory is that the apparent "high price" per coin is scaring people off, because buying a fee split coin at 12 million USD cap seems like a huge steal to me. It payed out at $180/CEFS last month, which is an ~8% ROI each month. It also pays based on what you hold at the end of the month, which is tomorrow, so I'm probably going to buy in tonight and see how the payout goes.

COSS - This is the only one I already own, and I bought in at $0.20. I am considering buying more. For some reason though, nobody trades on their exchange. It is truly not a bad exchange. This one also feels like a hidden gem, it's just that the volume is so low that the ROI is less than 1% right now. It's the risky buy for the future.

Kucoin Shares - Down from $20 to $4, now at a 400 million dollar market cap. Seems like a decent chance to buy in. Can anyone comment who owns some?

QRL (Quantum Resistant Ledger) - Set to launch the mainnet this month, it will start as proof of work and transition to PoS later this year, so it's a long-term HODL - especially since Quantum Computers are still in the development phase.

PIVX - Like buying DASH at $35. The ROI is small now but it's a hold in case it increases in value. Great, community run project as well. I'll likely be buying in unless anyone knows of any red flags that make DASH superior or something.

Lisk and Ark - Great but still too expensive, feel like I've missed the boat on those two to really see any big ROIs long-term

Any comments on these coins or suggestions for others I didn't list are greatly appreciated.