That's like taking a shower without getting wet.

If there is a profitable coin, it's not easy to mine as many other miners will also mine it and you compete with all of them.
Being profitable can either be achieved with a lot of hashpower (private mining farm) on coins with a more or less stable coin
or mining less profitable coins on stock and selling them during a pump or a general price increase (so you need to do som research which coin have potential).

So that means you have to invest money/time? Yes, nobody said mining is an easy profit machine

Just my 2 satoshi