you can invest it in some of the projects like website projects around or can buy it's shares or even opening your own faucet can also be a good idea.
A proper job is the best way to earn every month in a steady rate. Investments like trading and mining rigs can be profitable in some people. Altcoin trading is profitable since the market is extremely volatile there.
Opening a faucet is not profitable - most of them get scum traffic and bots which steal the balances and the sites go down. Moreover many faucets are running ponzi schemes and are out to steal people's money so I dont really support that idea.