Enjoyed the article! A coin that you are missing is Vechain, you dont currently get passive income from it but once mainnet launches at the end of June you will begin generating VTHO (thor) daily for any amount of Vechain that you have, even if you only have 1 Vechain. Also their are different node levels that will generate you extra VTHO such as 10k, 50k and 150k. On top of that I think it'll be a coin that increases dramatically in the future!