1. Should I choose a one topic like current affairs or only bitcoin or only altcoins discussion or should I post everything here.
Firstly you are welcome to the highly recommended Bitcoin community the first of its kind it's a very wide community and our interest is not just bitcoin but the whole cryptocurrencies at large.
The forum is also interested in research topics, political discussions (crypto space depends on this), tutorials, scammers alert and any informative post you wish to share.