POS & Masternode coins require investment for Collateral.
Idena, NKN and Theta Fuel - All these three coins don't require any investment. Just run the nodes & start earning with zero balance.
One more to add Qortal -
https://bitcointalk.org/index.php?topic=5258519.0yes indeed. that's the reason why I like bandwidth coins because they don't require any investments. Unlike staking and masternode coins that you have to invest a huge sum of money.
Thank you for adding up one more. I will check Qortal.
If you have more bandwidth mining coins please feel free to add it here. thanks everyone!