what do you mean with "secretly" ?
many ways to make money in this forum (from bad way to good way)
- scamming another people
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
- join fuc*ing ponzi program
![Angry](https://bitcointalk.org/Smileys/default/angry.gif)
- gambling (you can loose money too)
- buy some cloud hashing to mining BTC (not profitable anyomre? )
- join signature campaign (i want join too
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
)
- learn about any promising ALT coin and mining it when still cheap (and dump it when hit mintpal
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
)
and many more
all you must do is learn about it