The safe way would be to buy masternode since you let your computer do the work for you but then you need to have bigger capital too so that if possible you can set up several masternodes. You can try POS coins too since it is cheaper but you will earn lower amount of income so masternodes would be the best option for it.

Another way would be trading but you need experience for it because most likely if you are just starting, you will lose more than profit but through experience, you will figure out a way to be a profitable trader but if you are in a hurry to earn that amount then trading is not the ideal way if you are a newbie to it because you will be susceptible to being an emotional trader.