First of all, you're not earning merits over Bitcoins but Bitcointalk (this forum)! Don't adjoin both of them together as they're not related to each other in any way.

Second, if you're interested in earning merits, stop thinking about it and start working here by learning more and more, gain better knowledge about each of the concepts here that you see and try to understand what does it literally mean. That's how you will EARN merits, by working for them being completely selfless. People here give good merits to posts that possess an information that is much better and newer or at least more informative than others, so don't worry. Forget about them and just put more efforts in improving your quality as well as make on-topic posts.