There are coins that can yield you monthly returns. Look into coins that you can made a masternode off of ie Dash, PIVX, NEM, etc. Also look for coins where you can stake. Here you can generate more coins if you have a good amount in your wallet which would earn you more money.
Buying a Dash node is just out of the possibilities of most people IMO. The ones that got one are earning very nice returns, and that is one of the reasons why I don´t hold Dash. I am not willing to pay a huge amount for the security of a net that is not that decentralised.