You can do mining if you want to have stable passive income,but if you dont have anything to start you can join bounty campaigns instead because it is the safest way to earn cryptocurrencies.If you asked me $1k can be easily achieved if and only if you know what you are doing,trading needs a lot of analysis,technical and fundamentals are both needed.
Are you sure you are making more money from the bounty campaign itself. I am not believer of bounty campaigns at all mate. There are few bounties only getting successful project in the market. If you have luck on your you may part of it.
Else how it is possible to find the 1k USD per month. I do not think it works for op.
Better ask him to invest the money on mining rig set up. Which can give around 1k USD for the 30 mining cards. I mean rx 580 cards let him try if he investment fund.