I don't who have suggested you to use bitcointalk for the purpose of earning only but there is lot more things which you can get from here. You are a newbie and you have limited knowledge about this forum. I will suggest you to learn this forum's rules before running after bounty campaigns. You have mentioned on your post that you made investment on bitcoin but most of the time failed to make profits. If you spend your time on bitcointalk by reading different posts to gather knowledge about bitcoin and its different field of investment then i think you will be able to make profits from your next investment.

So, what do you think ?

Isn't it better to learn before staring to earn.